Crackle technique with fused glass
- May 4, 2009 at 2:38 am #9092Wen_WinnipegParticipant
I’m very interested in finding out more about the crackle technique I see in many glass galleries — I suspect that it is similar in process to making glass lace or crater glass design elements, but have been unsuccessful in finding any solid information.
Any guidance would be appreciated!
Hi everyone–since this request for info was posted, I’ve taken two of Bob’s workshops at his studio on Saltspring. Great teacher, and I recommend those interested to jump at the opportunity to study with him.
WMay 4, 2009 at 8:39 pm #11284AnonymousInactiveMay 5, 2009 at 2:48 am #11285Wen_WinnipegParticipant
Yes–I’ve seen a few artists exhibiting using this or similar techniques, and know that Robert teaches. However, I have seen some hobbyists showing pieces on line obviously using some type of powder techniques that are similar, so I was hoping there was some generally available information or advice.
wMay 11, 2009 at 1:26 pm #11286Pam BParticipant
After seeing the crackled look I was impressed. I found this and I think it explains a bit.
Cohesion on a liquid’s surface results in a film-like force called surface tension. This is the same force that causes water to bead up.
“When glass is heated to a liquid state, it too falls subject to surface tension. With soda-lime glasses (i.e. most common art glass) at fusing temperatures the surface tension forces the liquid glass to a height of about 5 mm. That means that if the glass is thinner the surface tension will pull it into a smaller area. If the glass is thicker then it will spread to a larger area until the height is about 5 mm. As the temperature rises, cohesion — and thus surface tension — weaken and the glass will spread more.
Surface tension can be a useful force for the artist who understands it. Well known kiln-glass artist Bob Leatherbarrow uses surface tension to achieve is unique trademark “crackle” technique.”
Now I too want to find out more. I am not sure and have yet to try it but it sounds like confetti or a thin layer of frit could accomplish this???
pamDecember 15, 2009 at 4:25 am #11287AnonymousGuest
Thanks for your this beneficial sharing.June 3, 2011 at 12:13 pm #11288bagyoParticipant
when’s the next workshop with leatherbarrow at Helios?December 18, 2012 at 2:16 am #11289MhohmannParticipant
How would one go about achieving this look on a longhorn skull.
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