Etching: A Beginner's Guide

Key Highlights

  • Etching is a way to make art prints. It uses the intaglio method and needs acid to create a picture on a metal plate.

  • You take a metal plate and cover it with wax. Then, you scratch your design in the wax with a tool. After that, you put the plate in acid. The acid goes into the lines you scratched, and the design stays on the plate.

  • A long time ago, artists used copper plate or iron plates for the etching process. When the design was done, they rubbed ink onto the plate. They put the metal plate in a printing press and printed the image.

  • Etching is a big part of art history. This printing method got a lot of notice because artists like Rembrandt used it.

  • Now, people use new ways that copy the feel of etching. These methods do not use any tough or harmful materials. This means any person can try them, no matter their skill level. This makes it easy for more people to learn and get involved in etching.

Introduction

Have you ever looked at a picture with lots of small lines and details and wondered how people make it? That picture could be the result of etching. Etching is a part of printmaking. It has been used in art for a long time. This process uses a metal plate so the artist can draw thin lines and shapes on it. The same artwork can then be made over and over from this plate. A long time ago, people used etching for armor, and after that, well-known painters used it for their art. It is a special way to help drawings stand out.

Understanding Etching in Art

The etching process is a way people use for intaglio printmaking. In this process, the artist does not cut the picture by hand. A chemical is used to make the lines. The grooves made in the plate will hold the ink. The etching process gives artists the chance to work with more freedom. It helps people to make their designs more easily. Using etching is simple and enjoyable compared to other printmaking methods.

This way of printmaking has been well known in art history. People use it to make artwork that many can see. The resulting prints have fine lines and strong dark areas. That is what artists hope for in their artwork. Many see this style as the top choice for printmaking. It works well when artists want to show clear and bold scenes of landscapes or people. Let us look at where printmaking began and how it is different from other ways to make artwork.

Definition and Origins of Etching

The practice of etching began when people in Europe wanted their armor and guns to look nicer. The idea started in the Middle Ages. People looked for ways to add pictures and designs on metal. Daniel Hopfer from Augsburg, Germany, tried something new. Around the late 1400s or early 1500s, Daniel started using etching for printmaking. He picked iron plates for his prints. This was how printmaking began in Germany.

The way people made art started to move around to new places, and many think that changing to copper plates happened in Italy. Copper is a soft metal, so it is easy to shape. This made it simple for artists to add a lot more detail to their art. With this new method, etching became a strong rival to engraving in the renaissance. A lot of artists started to pick etching, since it was much easier to learn than engraving. Engraving needs a person to have special practice with metal, but etching does not.

For artists who knew how to draw, it was easy to use etching on wax. This way be much easier than having to cut out pictures in metal. Etching in wax let a lot of people make art without many problems. A lot of artists could use it to make their own pictures and send them to others. Over time, etching helped printmaking change and grow.

Key Differences Between Etching and Other Printmaking Techniques

Etching is one way to make art in the intaglio style of printmaking. It is different from engraving or drypoint. The main difference is how you make lines on the surface of the plate. In printmaking, you get small grooves in the plate for ink to sit in. But each method uses its own tools and does this in its own way.

In engraving, the artist holds a sharp tool called a burin. The artist cuts lines in the metal plate by hand. This work needs skill and strength from the artist. Drypoint is much like engraving. In drypoint, the artist uses a needle to scratch lines into the metal plate. When the needle glides over the metal plate, it makes a rough edge. This edge is called a "burr." The lines made by the burr look soft and feel fuzzy. Drypoint lines feel different from engraving. The burr gives drypoint lines a look that stands out.

Etching is a method the artist can use to make art with chemicals. The artist puts a soft ground on the plate. This ground keeps the acid away from some parts of the plate. The artist will draw their picture on top of this ground. When acid is put on the plate, it will etch lines into the plate where the drawing was made. This is what sets etching apart from other art ways.

  • Etching: You take a metal plate and draw on it. After that, you put acid on the metal plate. The acid eats away at the parts where you have made lines. This helps you make your sketch on the plate. The ink stays in the lines that you have made. This is a way of printing with a metal plate.

  • Engraving: You use a tool called a burin when engraving. You hand-cut lines into the metal plate. The lines you make hold the ink. Engraving is one way you use for printing.

  • Drypoint: You take a sharp needle in drypoint and scratch lines onto the plate. A burr rises near the lines you draw. This burr holds extra ink for the print. Drypoint is a good and common way to make prints on a metal plate, too.

Essential Tools and Materials for Beginners

To begin with traditional etching, you need a metal plate. A copper plate is one of the best choices. People often use copper because it is easy to work with and gives good results. When you have a copper plate, it becomes your canvas for the etching work.

Get an etching needle or any sharp tool for sketching. Take this tool and scratch your design onto the wax covering your metal plate. The wax sits on top of the copper plate and keeps it safe as you work on your design.

You need a copper plate and an etching needle to make marks on copper.

You need ink to make your picture look real. A sheet of paper is needed because your image will be on it. It is good for you to know about ink and a sheet of paper before you start making etchings. Now, we can talk more about the sheet of paper and the ink. We will also show some easy choices people use these days.

Plates, Inks, and Printing Surfaces Explained

The metal plate you choose for printing is important. Many people like to use copper. It works well with acid and makes your print feel smooth. But copper can be pricey. A lot of beginners go for zinc. Zinc costs less and still works well, but the lines might not be as sharp as with copper. Steel is another option you have. It lasts for many years and gives prints rich color. Long ago, etchers used iron plates as well to create their prints.

After you make the grooves in your plate, you need to put ink on the printing surface. Work the ink well into all the lines that you cut into the plate. The ink needs to stay in the grooves, but you should clean the top so there is no ink left on it. Next, place a piece of damp paper over the plate so you can start printing. A printing press is used to squeeze the plate and paper together. The damp paper helps in printing. The water makes the paper fibers softer, so the paper can pick up the ink from all the tiny grooves.

Plate Material

Characteristics

Best For

Copper

Bites evenly, holds fine detail, produces high-quality prints.

Professional artists and detailed work.

Zinc

Cheaper, bites quickly, but lines may be less clean.

Beginners and experimental work.

Steel

Durable, creates rich background tones, long-lasting.

Artists producing large editions of prints.

Introducing Gel Press Products for Easy Etching

Traditional etching can make your prints look good. But to do printmaking the old way, you must use acids and strong cleaners. A lot of people do not want to use these things at home or in school. This stops many from trying printmaking. Gel Press products give you a new and better way to make prints. The prints will still look like real etching. You do not have to use harsh chemicals. This way is easy and safe. Now anyone can try printmaking and have fun with it.

Instead of working with a metal plate and acid when printing, you can use a Gel Press plate. Prints made this way have thin lines and soft, gentle shades. You will see that the lines and tones look like what you see in things called etchings. The first step is to put acrylic paint on the plate. Then, take a stylus or skewer, and draw your idea in the paint. This helps you make good lines and feel the texture at the same time. It is easy for anyone to make their art stand out with this printing method using the Gel Press plate instead of a metal plate.

The Gel Press 8"x10" plate is a good choice to begin with. There is lots of space for your ideas and new designs. The process is safe, and there is nothing dangerous in it. You won't need to feel worried. You can use soap and water to clean it. This plate is also nice for workshops and art classes.

  • Safe for All Ages: The gel plate is safe to use. It does not have any acids or strong chemicals in it. People of all ages, kids and adults, can use it.

  • Easy Cleanup: You can clean the plate with just soap and water. A baby wipe will work well, too.

  • Versatile Creativity: You can use the plate for monoprinting. It helps you get the look you want in your art. The feel can be close to etching.

The Step-by-Step Etching Process

The etching process begins with the plate being plain. Someone will put the etching ground on top of this plate. The etching ground keeps the acid away from the metal. The artist will then use tools to make marks on the surface. These marks make incisions, so the metal under the etching ground can show through.

The next part is called the biting stage. In this, acid is put on the open lines. The acid does its job there. Then, you add ink on the plate. Be sure to wipe off any extra ink. After that, press the plate onto a sheet of paper. This is how you see the image. It is important to do each step with care. We will look at each step by itself.

Preparing Your Plate and Sketching Your Design

Your journey begins with a clean metal plate. You have to make sure there is no grease or dirt on the plate. The surface must be very clean before you use the ground. When your metal plate is ready, you will put on a thin and smooth layer of waxy ground. This ground is tough and keeps the metal plate safe from acid. The acid cannot touch all parts of the metal because the ground covers and protects it.

With the ground ready, you can start sketching what you need. Get something sharp, like an etching needle. Take the etching needle and gently scratch the wax on the surface. As you do this, you will see the metal showing from under the wax. You are not cutting the metal. You are just moving the wax off the top. Each mark makes a line that will show in the final print.

This part lets you use your creative side with ease. The movement is smooth, just like when you move a pen on paper. You can make clean and bold incisions here. Keep in mind, the print you make will be flipped and show a mirror image of your design. So, remember this if you use text in what you make.

Applying Grounds, Drawing, and Acid Bath Techniques

After you sketch your design, the plate is set for the acid bath. You have to place the plate into a mordant or etchant. Most of the time, this will be an acid solution. When the acid hits the exposed metal, a redox reaction starts right away. The acid will only work on the areas where you made your drawing marks. The wax etching ground on the plate keeps the rest safe from the acid. If you keep the plate in the acid bath for a longer time, the lines in your artwork will become deeper and darker.

Printmakers have a few ways to do this work. They can take the plate out of the acid from time to time. After that, they put varnish, also called "stop-out" varnish, on some parts of the lines. This makes lines that are not all the same depth. The lines make some parts of the picture look lighter or darker. This makes the image feel different and makes it look more interesting.

Handling the acid bath needs some skill. You have to be right there with it. Always watch it and do not leave it alone.

  • Bubbles: If you see bubbles on the plate, use a feather to brush them off. This lets the acid reach the lines better. It helps them stand out.

  • Acid Strength: How strong the acid is, and the length of time the plate stays in the bath, are both important. Many artists use test strips. This helps them know how long the plate should be in the bath to get the look they want.

Common Etching Techniques and Styles

Besides using the regular etching process, artists have many ways to make their art stand out. They try new ideas to show lines, textures, and shades in the work. This makes the art feel unique. The main styles people notice in the etching process are line etching, aquatint, and sugar lift.

Each of these ways can change how the ground and acid touch the plate. For this reason, the printmaker can choose from several tools to make their etching better. When you get to know all these methods, you can put more feel and depth into your own work. As you do this, you will get better outcomes in your projects.

Line Etching, Aquatint, and Sugar Lift Explained

Line etching is the main way people start printmaking. In this process, you use a hard layer. You draw lines on it. This will make the main image for your prints. A lot of people like line etching. The lines be clear. There can also be many small details in it. But most artists do not just use this step. They often mix line etching with other ways. This helps make images that be more complex.

Aquatint helps to make smooth and flat areas on a plate instead of making just lines. A fine powder resin is put on the plate. When you heat the plate, the resin melts and forms a rough layer on it. This rough layer stops the acid from getting into some spots. When you etch the plate, this surface holds the ink well. So, you get smooth, flat spots that look like a wash of watercolor.

Sugar lift is a method that helps the work feel more like a painting. In this process, the artist uses a mix of sugar to paint the design on the plate. After this, the artist covers the plate with a liquid ground. Then, the plate goes into hot water. The sugar melts and comes off. This shows the metal where the strokes are. At this point, the piece can be etched.

Technique

Description

Visual Effect

Line Etching

Scratching lines through a hard ground.

Creates clear, defined lines.

Aquatint

Using a powdered resin ground to create a screen.

Produces tonal areas of color or shade.

Sugar Lift

Painting with a sugar solution that lifts off the ground.

Creates painterly, brush-like marks.

Tips, Tricks, and Mistakes to Avoid for First-Timers

If you are just starting with etching, you feel better when you know how it works. A lot of people get a problem called foul-biting. This is when the acid goes through the ground and puts marks on the plate that you do not want. You stop this by making sure the ground is spread even on the plate. When you do this, the plate looks better when you finish.

Some people get things wrong when they do the acid bath. If you leave the plate in the bath for too long, the lines get too deep. This will make the lines look blurry. But if you do not keep the plate in long enough, the lines will be too light. Then these lines do not hold the ink well. The best way to know how much time to leave the plate in the acid bath is to practice. Try some test plates. This can help you get the process just right.

Getting the right amount of ink is very important. You also have to make sure to wipe it well. This will help you get a clear print. If you are new to this, there are some easy tips that you can use.

  • Start with a simple design. This makes it easy to know what you have to do next and helps you feel good about it.

  • Always work in a place that has good airflow when you use acids. This keeps you safe.

  • Use a test strip to find out how long to etch. This is important to get the line depth that you want.

  • Clean your plate with care before you use ink. Doing this helps you get a clear image.

  • Wet your paper in the same way all over. This lets the ink move to the paper without any problems.

Etching in Classrooms and Workshops

Etching is a good way for students to learn in art classes. It helps them get to know printmaking, history, and science together. These workshops let students use their hands to make art. This way, they feel close to the old ways of printmaking. But the acid and other things used in etching can be harmful. Because of this, strong safety rules must be in place.

It is good to have printmaking in the classroom. You should keep the feel to printmaking when you choose project ideas. At the same time, you need to make sure the classroom is safe for all people. Also, let students feel free to think, so they can use their ideas and be creative. This way, a new group of young artists can feel inspired.

Project Ideas for Creative Education

Bringing etching into the classroom can help you and your students in many ways. A great way to start is to show the class how you can use sketches to make prints. In this project, you and your students learn to take a sketch and turn it into something new. The class will see how they can make several copies of the same sketch in a new way.

If you want to try printing in a safer way than etching, you can use Gel Press plates. These plates work great for both printing and monoprinting. The students can draw what they want right into the paint on the gel plate. The lines you get this way look like the ones you see with etching. So, you can be creative and do printing when you like, and you do not need to use any dangerous tools or materials.

Talking to students about old printmaking ways while they do their work can help them learn more. You can use art from master etchers to show what they can make. This may inspire them. They might want to try printmaking themselves after they see the work.

  • Landscape Prints: Get the students to sketch what they see outside. They can use different types of lines in their sketches. This will help them show feel and depth in the picture.

  • Portrait Sketches: Tell the students to sketch someone's head. Let them try showing what the person is feeling or showing in the sketch.

  • Abstract Designs: Let the students sketch lots of patterns. Ask them to feel sketch textures as they draw.

  • Nature Studies: Have the students use leaves or other things they find outside. They can press these items into soft ground or on a Gel Press plate to make their own sketches.

Safe Practices, Cleanup, and Setting Up a Monoprinting Space

Safety is the most important thing when you do printmaking with normal materials. A lot of acids and other things get used in printmaking that can be bad for people. It is a must to be careful and keep to all safety rules. A good and safer option in printmaking is to use Gel Press plates. You can make your own place for monoprinting. This way is better and keeps you more safe.

For the old way of etching, you need to work in a place that has good air flow. You should also put on gloves and safety glasses to help keep you safe. You must be very careful when you use acid. There should be a safe way to get rid of any waste after you finish. When you clean up, you can use solvents to take off the ground. Make sure that the place you work in always has good air moving through it while you do this.

A monoprinting workspace is easy to set up and you will feel safe when you use it. You just need a flat table to work on. You will need Gel Press plates and some acrylic paint for this. You should also get paper for your prints. This setup works well at home in your own studio. You can also use it in a classroom.

Tips & Safety

  • Traditional Etching Safety: When using acids, always wear chemical-resistant gloves and safety goggles. Ensure your workspace has excellent ventilation to avoid inhaling fumes.

  • Non-Toxic Alternative: For a completely safe experience, use Gel Press plates with water-based acrylic paints. This eliminates the need for any harsh chemicals.

  • Workspace & Cleanup: Protect your work surface with a non-porous barrier like a craft mat. For monoprinting with Gel Press, cleanup is easy with just soap and water or a baby wipe. Store plates flat in their original packaging.

Famous Etchers and Lasting Influence

The story of etching started when the big artists began to use it in new ways. In the Dutch Golden Age and the time after, etchers like Rembrandt, Francisco Goya, and Pablo Picasso did good work. They changed how people use printmaking with plates and acid. This helped make printmaking important for art, not just copying pictures. Because of what they did, people now see etching as real art.

The art made by these famous artists is in museums around the world. You can see some of it at the Metropolitan Museum of Art. If you learn how they created their art and what it means, you will feel inspired. You will start to see the special things about etching, and you might begin to like it even more. Now, let’s read about these artists who helped change the world of art.

Masters of Etching: Rembrandt, Goya, and Beyond

When people talk about good etchers, you often hear the name Rembrandt van Rijn first. Back in the 17th century, he changed how etchings were made. Rembrandt used both drypoint and etching in his drawings. When he added these together, every scene became more deep and had more drama. The way he used light and shadow is better than most artists’ work. Rembrandt’s skill in etching was above the rest during his time.

In the 18th and 19th centuries, Francisco Goya used etching to show what he thought about life and people. He wanted to get his ideas about society and politics out there for others. A work from him, called "Los Caprichos," is one you can look at to see this. In it, you see that he talked about some of the hard things people deal with. He used strange images in his etching to tell those stories. There were other artists, like Annibale Carracci in Italy and Pablo Picasso. They also used etching. These artists found ways to show their feelings in this art, too.

These artists proved that you can use etching for more than copying drawings. They used it to make new and fresh art. What they made still helps printmakers in many places today. Their ideas and the style they showed can be seen in the work of many people around the world.

  • Rembrandt van Rijn: rembrandt is famous for the way he works with light and shadows in his art. His portraits let people feel real emotion. You can see honest thoughts in their faces.

  • Francisco Goya: francisco goya uses etching as his style in art. He shows how he sees things in his work. He made series of pieces that get people to think about their own society.

  • Pablo Picasso: pablo picasso made a lot of prints during his life. A good example is the "Suite Vollard." pablo picasso found new ways to use prints. His art helped people see prints in new ways.

How Etching Shaped Artistic Movements

Etching has a big place in art history. It really changed how people think about art. Back in the time of the Renaissance, artists used etching to do their sketches. This lets people see new designs and share them with others. It is a good way for new art ideas to go all over Europe.

The art of etching became popular in the Dutch Golden Age during the 17th century. At this time, artists such as Rembrandt used etching to show daily life. Their art showed how people feel and small parts of life. Etching was new. Many people in the middle class could buy it. People still liked etching later. It became very popular again in the 19th and early 20th centuries.

Etching has been a big part of art for many years. If you visit the Metropolitan Museum of Art in New York, you can see how it has changed over time. There are pieces that show it started in Germany. You will find works by Dutch artists there, and also see some from Italy. These artists found new ways to use etching. It has played an important role in art through the years.

Conclusion

To sum up, etching is a good and fun way to make art. It pulls skill, new ideas, and a bit of history together. You use special tools and practice with this printmaking craft to get better. Even if you start with nothing, you can end up with nice art. When you know what things you need for printmaking and how to use them, you can get to etching fast. You can do this at home or in a class. Be sure you stay safe and clean as you work. This way, your work will be much better. Special Gel Press products make printmaking quick and easy. When you feel ready, use the supplies we talk about and start printmaking today!

Frequently Asked Questions

What makes etching unique compared to other printmaking methods?

Etching is not the same as engraving or drypoint. It works by having acid act on exposed metal and making a design. With engraving or drypoint, the artist will use their hand to carve the plate. The intaglio method with etching will help make lines that look like a drawing. This gives the finished print a feel that is clear and full of life.

Can I use Gel Press products for etching at home or in workshops?

Yes, you can do this! Gel Press plates are a good way to start printmaking at home or in a workshop. These plates are safe to use with paint. You can make your own design on it. When you use Gel Press plates for printmaking, you get results that feel like old-style etching. You do not need acids or strong cleaners to try this, so anyone can do printmaking.

What safety precautions should beginners follow when starting etching?

If you start with traditional etching, you need to be careful. Work in a space that has good airflow. You should wear gloves to keep chemicals off your skin. Put on something to protect your eyes when you use acid. Make a plan for cleaning up, and take out all the chemicals when you finish. If you want more safety, you can also use acid-free ways, like monoprinting.

What is etching and how is it used in art?

Etching is a type of printmaking where you use a metal plate. A lot of people use a copper plate for this. The artist draws or cuts a picture onto the copper. Then, they put acid on it to make marks and lines on the plate. This way is called intaglio printmaking. Many people like it because the prints have strong lines and deep dark areas. It also lets artists draw on the metal plate and test new ideas for their art.

How does the process of etching work step by step?

You start by putting wax on a plate. After that, use something sharp to scratch a design in the wax. These lines where you scratch are open. Next, put the plate in acid. The acid will etch lines where there is no wax. Then, take the plate out and clean it. Put ink on the plate to fill those lines. Wipe off any extra ink. In the end, press the plate onto paper. That is how you use wax, ink, and the etch method to make a print.

What materials and tools are needed to start etching?

To start the etching process, you need to have a metal plate. This can be copper or zinc. Put wax over the plate so that acid does not touch the metal. Take an etching needle and draw your design into the wax. Once your design is there, use acid to finish the etching process. Be sure to use safety tools at this time. When the plate is ready, put ink on it. Use a printing press with paper to see your finished print. This is an easy way to use the metal plate, etching process, etching needle, wax, copper, zinc, print, and ink with a printing press.

What are the key techniques involved in creating an etching?

Many artists use several ways to make their artwork. Line etching is used for sharp lines. Aquatint gives shade to some parts of the picture. Sugar lift helps the art look more like a painting. A lot of people mix these in one artwork. Drypoint is another method that they use at the same time. When you put these together, the artwork can have many layers and small details.

Can you explain the history of etching in printmaking?

Etching began in Germany in the early 1500s. People first used it to put designs on armor. When the Renaissance reached Italy, it became popular for art. In the 17th century, artists like Rembrandt made etching even better. He showed that art can have a lot of feeling.

How are etchings different from other types of prints?

Etchings and engravings are ways to make printmaking designs. With engraving, you need to cut lines into metal by hand. You do not use acid for this method. Etching uses acid instead. You do not carve with this process. Both etching and engraving are part of intaglio printmaking. The look and feel of each one is not the same. Etched lines show up in a style that is different from engraving. You can see the difference when you look at what is on the plate.

What famous artists are known for their etching work?

Many people know pablo picasso, francisco goya, and rembrandt because they are thought of as great etchers. pablo picasso and francisco goya both made some of their best art this way. rembrandt is also seen by many as one of the top etchers of all time. Each one had their own unique style. They all showed us what you can do with etching. Both experts and fans still talk about pablo picasso, francisco goya, and rembrandt and all they did as etchers.

What are common mistakes beginners make when starting etching?

Some people who are just starting can make some simple mistakes doing this. A person may not spread the ground well or cover it in an even way. Sometimes, the plate stays in acid for too long. At other times, it does not spend enough time in acid. A person can also wash or ink the plate in the wrong way. All these things can make the lines on the image look too light. The pictures may turn out blurry. There might be unwanted marks on the print, and this is not good.

How is etching used outside of fine arts, like in nanofabrication?

The etching process is not just used in art. A lot of people use the etching process in making things and in nanofabrication. The etching process helps make printed circuit boards and other electronic parts. You can also use it to make semiconductor devices and small pieces. Chemicals are used in the etching process to remove bits from the surface of the material. Because of the etching process, electronics have become what they are today. The etching process lets us build many small parts that we all use every day.

What is the definition of 'etching' according to art experts?

Art experts say that etching is a type of intaglio printmaking. In this way, artists use acid to make lines on a metal plate. This lets them create prints that have many small details. The lines feel smooth, and there is a lot of care in their work. Prints made with etching often show deep and strong shades.

What is an etching?

An etching uses a metal plate. A person creates a design on this plate. Acid is used to make lines on it. The ink goes into these lines on the metal plate. Then, ink is spread over the plate. A piece of paper is put on top. The ink moves from the plate to the paper. This is how you get the final picture.

What is etching vs engraving?

Etching be a way to get incisions in a plate with the help of acid. Engraving, on the other hand, let you use a sharp tool to cut lines into the plate by hand. Both these methods be intaglio ways you can use to make images. But etching rely on acid to make the marks. Engraving be when you cut lines into the surface using your hand. That is why lines from etching and engraving do not look the same from each other.

What is etching on a car?

Etching a car is to add the VIN to your windows. The VIN is the Vehicle Identification Number for your car. When you put this number on your windows, it will be there for all the time you own the car. This helps police find your car or any parts if they get taken. The number on the glass makes it hard for thieves to sell the parts, because it shows the parts are stolen.

What are the two types of etching?

There are two ways you can do ground-based etching. The first way is hard-ground etching. The other way is soft-ground etching. Hard-ground etching lets you make sharp and clear lines. You can always see these lines well. Soft-ground etching uses wax that does not harden or dry out. This way, the lines feel softer. You also get to see more texture. The lines from soft-ground etching may look like they were drawn with a pencil or crayon.

Ben Tiffany