Garnet Dark is the most saturated self-striking Ruby Northstar currently offers. It is best suited for thin stringer, thin blown work, and lip wraps. The self-striking rubies are the next generation of colors offering the user cleaner, purer colors with less air and difficulty in working. When working Garnet Dark use a hot oxidizing flame. Once hot, Garnet Dark will turn transparent just as the standard Northstar rubies, but as it cools it turns a uniform ruby red. The strike is easily repeatable and the final color is not affected by kilning. Even after numerous reheats, no liviering will occur. Note the final shade of red is slightly darker than the initial color of the rod. Once heated and allowed to strike, the final color can be viewed. After prolonged use in sculptural and inside out applications Garnet Dark can develop a deep brown hue. This can usually be reversed by heating the color until molten.
Available in Rod, Frit, Fine Frit, & Powder.
Northstar Glassworks Borocolour Colored Rods & Frit
Northstar Borocolour has a COE of 33 and may be combined with Simax, Northstar and any other glass with a similar coefficient of thermal expansion.
Northstar Glassworks Borocolour Colored Rods are an average length of 18" with a diameter of 5-9 mm diameters. Hand pulled tubes vary in length from 8-22 in. with a diameter of 15-38 mm and wall thickness range of 2-6 mm. Northstar Rods and Tubes are sold by the pound with a 1/4 pound minimum purchase per color.
Northstar Borocolour frits are available in five grain sizes. Large frit is coarse 25 mesh - approximately .055 inches or 1.397 mm. Small frit is finer 38 mesh - approximately .024 inches or .6096 mm. Fine frit is 70 mesh and and powder is 100 mesh. These four frits come packaged in 4 oz. containers. Some colors are available in 16 oz. The fifth product size - called fore powder is between fine and powder in grit size and comes in a 16 oz. container.