Cold Characteristics

Consistent color.

Working Notes

Stable. No color shift.

Compared to Black (000100), Stiff Black (000101) has a slightly higher viscosity, meaning that it is a stiffer glass. In most kilnforming applications, Black and Stiff Black can be used interchangeably. Kilnforming applications where differences between Black & Stiff Black might be noticed include working with elevated drop ring molds and kilncasting.

Stiff Black was originally developed for glass blowing purposes such as the Roll-up Technique. Using Stiff Black in kilnformed panels for this application creates a more uniform viscosity, which is easier to control.

Made from crushed, screened, and magnetically cleaned Bullseye Compatible sheet glass. 

Frits are versatile and can be used in:
• Pâte de verre and kilncasting
• Kilnforming, including “glass sketch” and “painting with light” techniques
• Torchworking and blowing, to create colors and patterns on surfaces.