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30cm (17 g)
Iaso (4-6 mm)
246 €/kg

4.18€
incl. 19% VAT
plus shipping and handling
Add to Cart:

You will receive one glass rod approximately 30cm long when you buy this article.

Below you will find a table describing the product you will receive:

Double Helix Colour Name Iaso
Price per Kilogram (incl. 19% VAT) 246 €/kg
Weight per 30cm 17 grams
Price per 30cm (incl. 19% VAT) 4.18 €
Diameter of Rod (Approximate) 4-6 mm
COE (Coefficient of Expansion) approx. 104 x 10-7


Description from Double Helix:
Iaso (eye-ay-sow)
From test batch AX-598, the bronze version of Iris. Iaso has a high copper content and is capable of yielding bronze metallic exterior lusters. 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 luster can be accentuated by using a very small oxidizing flame to selectively erase portions of the luster, then repeating the reduction process.

In our experience, a brush reduction flame produces the best results.

Tips from Jed:
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.

This glass is excellent for glass bead making and other types of glass lampworking, and is compatible with other glass rods that have a coefficient of expansion of "104".


  • Model: DH Iaso 17g
  • Shipping Weight: 0.017kg
  • 37 Units in Stock
  • Manufactured by: Double Helix


This product was added to our catalog on Monday 12 February, 2018.

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