Min Posted February 15, 2013 Report Share Posted February 15, 2013 Does anyone have a method to check for crazing with dark glazes? My normal method for craze testing is to heat a glazed test pot in the oven @ 325 for 30 minutes then plunge the pot into room temp water, then repeat procedure twice, each time increasing the oven temp by 5 degrees. Then I rub sumi ink onto the pot, leave it sit for a few minutes, rinse and check for crazing. Works for clear, whites and most glazes but obviously not for black or very dark brown etc. I tried floating a solution of isopropanol and nepsy on a flat test piece, logic being the alcohol would evaporate leaving the nepsy in the crazing if there was any. Results were messy and not that conclusive. Any suggestions? Link to comment Share on other sites More sharing options...
Diane Puckett Posted February 16, 2013 Report Share Posted February 16, 2013 What about white ink? Dick Blick sells it online. Link to comment Share on other sites More sharing options...
Min Posted February 16, 2013 Author Report Share Posted February 16, 2013 Thanks for the idea Diane, I'll give it a try with a high expansion glaze that I know would craze on my clay to try it and see. What about white ink? Dick Blick sells it online. Link to comment Share on other sites More sharing options...
bciskepottery Posted February 17, 2013 Report Share Posted February 17, 2013 An LED flashlight may show crazing. Link to comment Share on other sites More sharing options...
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