Rod Oracle Black

Description

Soda-lime glassrod produced by Double Helix, Oracle Black has smooth working characteristics, reads “darker” than some existing black glasses, does not spread excessively, and can be worked very hot without boiling. Rods are dark blue but strike to black during the annealing cycle.

The Oracle project is an extension of what we’ve already done with Aether, Zephyr and Rhea; create low-toxicity, essential glass colors for the flame. We will be producing colors free from antimony, arsenic, cadmium, chromium, lead and selenium. Oracle-Black, Oracle-White (coming in 2018), Rhea, and Zephyr give 104 flame workers the option to use responsibly manufactured, low toxicity glasses in their work.

Working tip Neutral with striking colors, reactive with lusters. Kiln-strikes to final opacity and tonality.
For maximum opacity, particularly in thin applications, briefly cool the bead then lightly flame strike (30 seconds) before annealing for 2 hours or more at 510°C.

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)