background preloader

Metal working

Facebook Twitter

Doron Merav Jewelry par doronmerav. Pocosin Arts Metals Guild: Patina Handout for 8-6-11 Demonstration. Creating Color on Metal: Patinas. Description: Patina is defined as a film that is formed naturally on metal by long exposure to the elements or artificially as by acids or oxidation and is valued aesthetically for its color.

Creating Color on Metal: Patinas

On copper or bronze a patina tends to be either or green or blue in color and on sterling silver gray or black. When creating a piece of jewelry you should consider whether to patinate or oxidate before starting work on the piece. Soldering and pickling will remove most coloration, so create any color after you have finished all such work. If you will only be drilling the piece, then you may feel free to patina the work at the outset. It is very important when preparing a piece for patination that it is cleaned properly for coloration.

Metal+mettle. D.Bréchault.

metal+mettle

Bowl, copper, patina. Dia.: 9.5 cm As I walk through the neighbourhood these days, I notice the first blushing trees. So many shades of red: burgundy, crimson, vermillion, even some magenta – and some rusty reds too. I enjoy these rich and vibrant colours and I always have the urge to run to my studio and add splashes of colours to my jewellery.

The palette of a metalsmith does not have to be limited to a few muted shades of silver and gold. Tsubas (Asian Art Museum, San Francisco)Photo : Wikipedia Commons Several types of methods can be used to colour metal, depending on the colours you want to obtain – heat or chemicals, or a combination of both. Remember to wear goggles, and make sure there is sufficient ventilation in your studio. – Heat up the copper with the torch to a high temperature (until the metal is red hot). – Quench immediately in a boiling water and salt solution (Salt/water solution: 3 tablespoons salt to 3 cups water). Sarah Boo's Musings: Red Copper Oxide Patina. So many of my fellow metalsmiths are eager to learn how I achieve the red color on copper which I use a lot in my jewelry.

Sarah Boo's Musings: Red Copper Oxide Patina

These are definitely some of my most popular pieces of jewelry. Most people are curious what the material is because it doesn't look like what people think of when they think of copper. I learned this method in Japan about twenty years ago from my teacher, Ayako Kuroki. She called it "houshyayaki" which translates to "grilled borax". Mrs. Due to popular demand from both customers and other jewelers wanting to know how I do it, I started trying it again last night. It's actually a very simple method. As far as prepping the copper goes, Mrs. I'm no scientist, so I don't understand exactly what is going on in this process. I'm sure there are people out there who do understand the science behind it and I would love anybody to chime in with their knowledge/opinions. Copper Red Patinas: 4 Experiments with 4 Fluxes: Red Copper Patina.

A red patina can be developed on copper with a torch and any number of fluxes.

Copper Red Patinas: 4 Experiments with 4 Fluxes: Red Copper Patina

The heat is applied to the copper from below. When the copper glows red hot sprinkle on the flux for a speckled look. Alternately, apply the flux first, then apply heat, for a smoother color. (Generally, both techniques happen at the same time because the salt bounces around.) (If you don’t apply the flux you can get lovely tans and browns to blacks, depending on how hot you heat the metal: red hot gives the darkest colors.) Be careful with this technique, especially with thin copper.

Note that a black crust forms as you work the metal. Also, if you reheat an area that you’ve previously salted, the colors change, often going to oranges. I use a rosebud tip on my oxy-acetylene setup (see image right). Note: you have to turn the oxygen and acetylene dials way up to the 5-10 range. In theory, you could heat the copper very uniformly with multiple gas jets while holding it flat on a grill. 1st, cool the metal.