A speckled glass made by Double Helix. The glass is COE 104Ossa is the first in our new speckled colour family. Based on the popular €œspeckled lustre€? test batches OP-434 and OP-507. Ossa is a rich purple lustring glass with thousands of refractive inclusions dispersed throughout each rod. When exposed on the surface, Ossa can be left as a purple speckled glass, or it can be reduced to develop a variety of lustre effects. Using variations in flame chemistry, Ossa can produce a solid silver metallic layer, or a multi-coloured iridescence. When reduced and encased, the inclusions in Ossa produce a textured mother-of-pearl effect reminiscent of some dichroic coatings.
Speckled colours are reduction glasses with thousands of refractive inclusions dispersed throughout each rod. Reduction glasses contain silver that; when properly heated, cooled and touched by a reducing flame, will come to the surface of the glass to create a thin layer of silver.
All tested compatible with Effetre Clear 104 coe.