Reds

Red glass is a difficult color to use for many different reasons. I am no scientist but from what I understand the chemical composition of red is temper mental at best. I have experienced opaque red glass cause cracking due to incompatibility making the glass crack after annealing. Transparent Cherry red will turn brown if it is over heated. A chemical reaction will occur if white and red are in direct contact turning the red brown. The metal Selenium is added to the batch then melted. The melted compounds are cooled down in the manufacturing process at least once before I even start working with it. Once I add it to my glass it is heated over 2000 degrees then cooled in my annealing process. So the red color is going through several redundant phases increasing exposure to a rich flame making it oxidize and turn brownish.

Bright orangish-red glass with translucency. It is likely made with Selenium.

Here is an example of opaque red. Antique red has generally good workability. If it is spread too thin it looks dull. I have not had any compatibility issues with this red.