Glass Tips from Verrier

Initial Rate of Advance Tack fuses look easier than full fusing, but they are really one of the most difficult types of kiln forming. Tack...

Information from Bullseye shows that the Coefficient (average) of Linear Expansion changes rapidly around the annealing range. The followi...

“Heat work” is a term applied to help understand how the glass reacts to various ways of applying of heat to the glass. In its simple form, ...

There are a variety of reasons that you might want to make a formed piece flat again for another kind of slump or drape.   There are a va...

This information has been taken from various sources. Some manufacturers may change the composition of their glasses or the published infor...

A statement was made on a Facebook group that transparent glass absorbs more heat than opalescent glass. And it releases more heat during co...

The Bullseye research on annealing thick slabs indicates that it is important to have a 50mm space between the shelf and the kiln walls. Thi...

A critical range is the temperature around the annealing point. The upper and lower limits of this range are known as the softening and str...

One of the fundamental elements in kiln forming is gravity. When glass is hot it moves according to the effects of gravity and that has a...

T his is based on Graham Stone’s work with float glass. The temperatures are applicable to float glass, and so need to be adjusted for other...

Various glasses have different temperature characteristics. This listing is an attempt to indicate the differences between a variety of popu...

This image is taken from Pate de Verre and Kiln Casting of Glass, by Jim Kervin and Dan Fenton, Glass Wear Studios, 2002, p.27. It shows...

Low and Slow Approach to Kilnforming We are often impatient in firing our pieces and fire much more quickly than we need. After all, our...