Butterscotch

Butterscotch is a semi-opaque, buttery tan color. It can yield rich purplish-blue tones and silver hues. When kept in a more oxidizing environment more of the blues and purples will appear. If reduced, a silvery haze will appear on the surface. Butterscotch is easy to work and can take a lot of heat making it a forgiving striking color. It can be stretched out and is good for blown work and sculpture.

Northstar Seconds

Northstar Seconds are production batches that are out of spec from First quality color runs. Color hue and working behavior will be different than the First quality rods. Seconds should be tested to be sure they are working within your specific application. Seconds are approximately half the cost of First quality. Sold in 1 pound increments only.

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.