A reduction glass made by Double Helix. The glass is COE 104
Iaso (eye-ay-sow) has a high copper content and is capable of yielding bronze metallic exterior lustres. Like Iris, brief but repeated exposure to a small, cool reduction flame produces the best results. The temperature of the beads surface, as well as the intensity, duration, and frequency of reduction determines the final outcome. Variations in the lustre can be accentuated by using a very small oxidizing flame to selectively erase portions of the lustre, then repeating the reduction process.
All tested compatible with Effetre Clear 104 coe.
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Please Note: This item is on clearance and sold as-is—NO RETURNS will be accepted.
It does require particular flame settings, and bead heat and reduction duration are more critical than with, say, Triton. I have resisted trying to give specific timings (eg, cool 20 seconds, pass through specific flame “x” number of times, cooling “x” seconds between passes) because it is going to vary from person to person.
But I’ll do it anyway:
1) Shape bead
2) Allow bead to cool for 20 seconds.
3) Adjust flame so candles are stretched 2mm from neutral.
4) Pass bead through flame, candles should touch bead and deflect yellow flame around the edges. 1.5 seconds duration for each pass.
5) Allow bead to cool 5 seconds between passes.
6) Repeat pass-through and cooling cycle 5-15 times.
7) Anneal. Turn your kiln down, it’s hotter than neccesary anyway. The reduction process is pretty much like Iris, with a slightly different flame setting, and passes closer to the torch face.In our experience, a brush reduction flame produces the best results.
