Penumbra
In Pounds
In Grams
1/4 lb
113 grams
1/2 lb
227 grams
1 lb
454 grams
5 lbs
(10% discount)
(10% discount)
2268 grams
(10% discount)
(10% discount)
Named for the shadowy edge of a lunar eclipse, Penumbra is a reactive “silvered” cobalt blue, reformulated from one of Paul’s old favorites. Different colors are produced from reduction or oxidation, primarily a wide variety of blues and greens. Reduction can create a luster that you can trap under a clear encasement. However, surface haze doesn’t burn off as easily as amber/purple type glasses.
