Etching is another way of creating designs on the surface of a metal object. All of the previous ways of creating designs that we have discussed have relied on physical modification of the metal surface, that is, we stamped, molded, or cut the surface to create a design. Etching relies on a chemical process, which actually eats away the surface of the metal.

This picture shows the type of elaborate designs that are characteristic of etched pieces.

Etched 2. Detalle. (Photo credit: Carme -)

Before we go any further I want to emphasize the importance of using caution and safety equipment with this process. The worst thing that most of the previous processes would have done if we had made a mistake is a mashed finger or a cut (assuming that we are wearing eye protection). But etching is different in two major ways: 1. Etching creates fumes. Some of the etching processes can create toxic fumes, and some just create vapors which will cause your tools to rust – never a good thing. 2. Some of the chemicals that can be used can burn your skin and mar other surfaces, too. This short article is not intended as a set of instructions, but rather as an informative piece to give you an idea of the basic process of etching.

“Drawing wire – what the heck is that?”

This question was echoed by several people. So, I decided to write a blog about the process of drawing wire. They didn’t understood the concept, how you would do it, or why you would do it – I can fix that!

Today we can purchase wire in any size that we want. Craftspeople often just buy the size of wire that they need because it’s easy and convenient. But once in a while you may find yourself in a position of needing to finish a piece of jewelry and you simply don’t have the correct size of wire – but you have a larger size.

What to do?

Draw down the wire!

BUT FIRST: There’s no more important rule than to wear safety equipment including glasses when drawing wire.

It does take a little muscle, and some tools. The process is not too difficult, but it takes some skill and knowledge. Most wire is sold “half hard”, which means that it is not super soft, but it is still very flexible. We exploit this fact during the drawing process.

The two most important specialty tools that you will need are a draw plate and draw tongs. A draw plate is simply a piece of tool steel that has holes of progressively smaller sizes drilled in it. The sides of the holes on one side of the drawer plate are often tapered to make the process easier and eliminate marks on the wire.

This picture shows two different styles of draw plate. The bottom plate simply has holes drilled through it, while the other has a regular hole on one side and a tapered hole on the other side. The wire is put through the draw plate from the tapered side of the hole.

Draw tongs are not a necessity, but they definitely make the process a lot easier. They are large, heavy, sturdy pliers, often with a hook on one or both of the handles. This hook allows you to have a better grip on the pliers so that you can pull the metal through the draw plate more easily. The following picture shows both common styles of draw tongs.

So how do we actually draw down a piece of wire?

The process starts by using a file to taper the end of the wire. Tapering the wire is essential so that it will go through the hole in the draw plate and extend at least ½ inch on the other side. Having a decent sized piece of wire to grab with the tongs is very important. A shorter piece will sometimes slip out of the tongs or break off.

The draw plate should be securely anchored in a vise before you try to draw down the wire. Make certain that the vise is held down securely. Start with a hole just slightly smaller than the wire diameter. Put the tapered wire through the draw plate, grab it with the tongs and pull! Be careful to watch out for the end of the wire. When the end of the piece of wire comes through the draw plate it usually does so suddenly, and a flying piece of wire can be dangerous. Wear safety glasses!

Personally, I had very little experience with drawing wire apart from the occasional need for a smaller diameter than I had on hand. That all changed when I needed wire to be harder for a specific project. And that brings us to another reason why you might draw down wire.

I now make several things for my shop that require the wire to be springy and fairly hard. You can harden wire by hammering it, but for large quantities of wire, the easiest way to harden it is by drawing it down. Every time you draw the wire down it will become harder and springier, and more difficult to pull through the draw plate.

Repeated trips through a draw plate using smaller holes is hard work. It’s amazing how much effort each pull requires. This is a skill that can be learned, but it takes practice – and sweat! The entire process makes me really appreciate how easy modern artisans have it in comparison to artisans living hundreds of years ago. Imagine having to draw ALL of your wire!!!

Next Time: Etching

Engraving is the process of cutting lines and designs into the surface of a piece of metal. The technique can be used either to create decorations and monograms, or to create a picture on a metal plate, which can then be used for printing. If you wonder what a picture that is printed from an engraved metal plate looks like, take a look at any dollar bill.

This is a picture of an engraved monogram on a tray that belonged to my grandmother. This piece would definitely have been engraved by hand. If you look closely you can see where each cut starts and ends and how multiple cuts are used to form each portion of a letter.

I’ll be focusing on the traditional engraving techniques. Modernly there are machines, some controlled by computers, that can do engraving all by themselves and an assortment of semi-automated pieces of equipment for use by individuals.

In traditional engraving, the tool that is used is called a graver or burin. The graver is made of hardened tool steel and has a long shank that fits into a wooden handle. The length of this shank is actually cut to fit the hand of the individual engraver. The graver is basically a very sharp, tiny knife-edged cutter, with a specially shaped wooden handle. This handle allows extreme control over the amount of pressure that you use and the direction of the cut. The handle is NOT hammered on, but rather is held in the palm of the hand. The variation in the size and shape of the cuts is accomplished by a combination of the shape of the graver cutting edge and the position in which the graver is held. The graver actually removes tiny curls of metal from the metal plate.

This picture demonstrates the difference in the shapes of just a few gravers, and even the differences in handle shapes. The top graver shows what it looks like before it is cut down and set into a handle.

Gravers must be sharpened on a regular basis. There are special holders available to assure that the graver is held at a very specific angle when it is sharpened. A dull graver, like a dull knife, is dangerous. It makes you push harder in order to cut and it is much more difficult to control the tool if you are pushing hard.

The piece of metal that is being engraved must be held very securely so that the graver doesn’t slip and mar the surface. The traditional technique for holding the metal is to stick it to the top of a handle with a small platform called a shellac stick. The piece is heated gently, along with the shellac, and then they are pressed together. Modernly there are new thermo-plastic materials that can be used to do the same job without leaving a residue on the piece that needs to be cleaned off. Thermo-plastic is a material which becomes moldable like clay when it is placed in hot water.  It can be re-used virtually indefinitely.

If the metal is three dimensional, such as a ring, it may also be put into some sort of vise that will not mar the surface of the piece. Obviously this will only work for small pieces. Larger pieces can be placed into a metal gravers’ ball. These are heavy steel spheres with built in vice jaws on top and a donut shaped pad. This pad allows the sphere to be rotated to any angle for working.

Pieces that are too large for any of the previously mentioned holding techniques can be held with padded jaw vises, or other padded hold downs.

Learning to engrave with traditional tools takes MANY hours of practice and a very steady hand. I hope that this brief summary gives you some insight into the complexity of the process.

Next time: Drawing Wire