Soda-lime glassrod produced by Double Helix, Iris is the production version of the popular test batch AX-605. The A was for Arke and the X was for 10 times the strength! Though designed specifically for exterior applications, the silver portion of the luster will hold up under encasement. This reduction color can yield a multicolored metallic iridescent luster.

Double Helix glass is compatible with all Effetre, Vetrofond and Precision 104 colours.
Glass for flamework: beads and spun glass.

Coefficient of expansion (COE) 104
Annealing temperature: 470°C (878°F)