How to Fuse Glass Metal Inclusions
We offer an entire category of Fused Glass Metal Inclusions comprised of Brass or Copper. Each item offered has been tested for the proper thickness to avoid annealing temperature differences between the glass and metals and to help reduce air bubble they are prepared to be the correct thickness.
There are only a few important tips when working with Fused Glass Metal Inclusions:
Here is a summary of metals:
Aluminum will never work as it has a much lower melting temperature than glass.
Copper or Brass: Thin sheets of Copper, Brass sheets or Mesh metals can be cut, cleaned and then sandwiched between glass layers for added detail. Copper will turn most hues of red to burnt umber. Brass will stay the same color to highlights of red tones.
Brass is any alloy of copper and zinc: The proportions of zinc and copper vary widely to create a range of brasses with varying properties. Brass should not be confused with bronze which is principally an alloy of copper and tin. Despite this distinction, some types of brasses are called bronzes. It is important to always test fire samples before planning any project. We have done all the testing for you. Each glass metal inclusion we offer to you has been tested and only those that work are provided. We also try to provide you an example picture with each item to give you a better idea of the results to expect.
There are 18 different types/names for brass. The most common are: Yellow brass is an American term for 33% zinc brass and Rich low brass (Tombac) contains 85% copper 15% zinc often used in jewelry applications.
TIP: To control air bubbles between the layers, you can sift clear fine frit on top of the first layer of glass, then add your metals. During the firing, hold at slumping temperature for 30 minutes and then continue your firing. This will help to squeeze out any air bubbles. This same technique can be done using brass or copper wire too.
Gold and Silver Foils: Very thin foil sheets work best, craft hobby foil. After full fusing the foil becomes permanently affixed to the glass without the need to use any binders. Handle it between two protective sheets or tissue paper or you can cut it into a desired shape (while keeping it between the protective tissue) and then slide it out onto the clean glass.
Gold and Silver "Leaf": Leaf is much more delicate than thin hobby foil.