biskuit.ru Posted November 15, 2015 Report Share Posted November 15, 2015 I can't rub anything but india ink into Cone 5 clear crackle glaze. Actually i have third firing in mind - after I rub say iron oxide wash into crackles, so it become permanent. But anything I tried (iron oxide, stains, overglazes) won't stay after I wipe them with paper towel. Where's the problem? Thanks! Link to comment Share on other sites More sharing options...
bciskepottery Posted November 15, 2015 Report Share Posted November 15, 2015 Could be the fineness of your glaze crackling. India ink may be fine enough to penetrate, but the others are too big. Link to comment Share on other sites More sharing options...
jolieo Posted November 15, 2015 Report Share Posted November 15, 2015 I am not sure but probably twofold , the particle size might not be fine enough to penetrate beyond the surface , and it might need more time to soak in. Maybe try mortar a pestle, and/or making a solution that won't dry fast eg gum Arabic or glycerin. Leave it on longer wetter and finer. India ink is very very fine , that's what gives it its opacity, plus it is in a lawyer ( or something similar) base, which binds to the porous surface Link to comment Share on other sites More sharing options...
PeterH Posted November 15, 2015 Report Share Posted November 15, 2015 You may find an old thread of interest http://community.ceramicartsdaily.org/topic/2657-india-ink-or-what-else/ Link to comment Share on other sites More sharing options...
biskuit.ru Posted November 15, 2015 Author Report Share Posted November 15, 2015 Thank you guys for your responses! Will try overglaze thinned with glycerin left overnight. Link to comment Share on other sites More sharing options...
Pres Posted November 16, 2015 Report Share Posted November 16, 2015 This may upset some of the purists here, but years ago when I thought crackle was so cool, I used india ink, then looking for something different tried some washes with acrylic paint that I had watered down. It worked quite well and allowed me to have colored crackle. However the black seemed to hold up very well. Wiping is a bit of a problem, but if it gets too dry, a little bit of a scuffy pad would work to remove the excess. Back then I would cut the pads of the school buffers that were thrown out to make a cleaner pad. These also worked well for all sorts of greenware cleanup, and for scrubbing tables and ware boards when wet. best, Pres Link to comment Share on other sites More sharing options...
Surubee Posted November 16, 2015 Report Share Posted November 16, 2015 Someone I worked with used to use a permanent black sharpie magic marker to highlight the crackle glaze on his pots (exterior only). Whatever solvent is in the ink really gets down into the cracks and the marker is not too difficult to wipe off the surface of the pot. I do not think that the color will survive through another firing, though. Link to comment Share on other sites More sharing options...
Tim T Posted November 19, 2015 Report Share Posted November 19, 2015 One thing you could try is using a hot pot so it is slightly expanded and the crazing cracks are a bit wider - take them out of the kiln a bit earlier, or heat them up on top of the kiln when doing your next firing. Also, if you can, ball mill the glaze so it is as fine as possible. Link to comment Share on other sites More sharing options...
neilestrick Posted November 19, 2015 Report Share Posted November 19, 2015 Most ceramic materials won't be a fine enough grind to get into glaze cracks. You can use colored inks, though. To remove the excess ink from the surface use mineral spirits or denatured alcohol or lacquer thinner. Link to comment Share on other sites More sharing options...
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