Pessy Posted October 25, 2022 Report Share Posted October 25, 2022 Hi all. A customer used some acrylic paint on a piece she wants us to fire in the kiln. Is there any way to salvage this? She used glaze for the other colors. Quote Link to comment Share on other sites More sharing options...
Pessy Posted October 25, 2022 Author Report Share Posted October 25, 2022 Does anyone know what would happen if I cover the acrylic with a glaze in the same color? What can happen when I fire it? Quote Link to comment Share on other sites More sharing options...
Bill Kielb Posted October 25, 2022 Report Share Posted October 25, 2022 (edited) Assuming this is currently in the bisque stage now, The acrylic paint will melt and burn. My best thought is wash off the glaze. Wash off the acrylic with solvent then re- bisque the piece to remove all traces of acrylic. Start over, ceramic products only - (glaze) this time to decorate. Acrylic comes off porous surfaces with alcohol, lacquer thinner, acetone. Edited October 25, 2022 by Bill Kielb Quote Link to comment Share on other sites More sharing options...
Kelly in AK Posted October 25, 2022 Report Share Posted October 25, 2022 I agree with Bill. If the paint is on top of glaze it may be peeled/picked off, but on plain bisqued clay it would be best to scrub it off and start fresh. I can’t say for certain, but I expect residue from the acrylic will interfere with glaze adhesion. Glaze crawling or glaze outright falling off the pot before it melts are likely possibilities. You’re fortunate it was caught before it went in the kiln. My thought was very hot water and a Scotch Brite pad. Hot water softens it as long as it hasn’t cured for days. If it’s stubborn, break out the solvents. Acrylic gets harder over time, if it’s freshly applied it’ll come off easier. Then re-bisque. Quote Link to comment Share on other sites More sharing options...
Callie Beller Diesel Posted October 25, 2022 Report Share Posted October 25, 2022 We used to burn off acrylic paint without solvent removal in high school. It WILL be stinky and require lots of ventilation. Some colours (like cobalt blue, titanium white or umber) may remain if she used a better quality paint. The cheap stuff from the dollar store is more likely to leave no trace. If you do elect to go solvent removal, hot vinegar takes acrylic house paint off of metal hardware quite well, but again you’ll want to do this somewhere well ventilated or outdoors. It’s not as toxic as some other options, but it’s quite pungent. I agree with Kelley, if you put glaze over acrylic, the acrylic can definitely act as a resist. Your customer is going to have to redo some of her work unfortunately. Quote Link to comment Share on other sites More sharing options...
Pessy Posted October 25, 2022 Author Report Share Posted October 25, 2022 Thank you. We'll have to take the longer route, we were hoping to avoid. Quote Link to comment Share on other sites More sharing options...
Pessy Posted October 26, 2022 Author Report Share Posted October 26, 2022 Thanks. I am trying to remove the paint, and if it doesn't come off easily, we'll have to redo it for them Quote Link to comment Share on other sites More sharing options...
Pessy Posted October 27, 2022 Author Report Share Posted October 27, 2022 Thanks for your help. I used rubbing alcohol to remove the acrylic paint from certain areas, and I will reglaze those areas now. I'm just wondering whether the alcohol is safe in the kiln? Or do I need to thoroughly wash it off? Quote Link to comment Share on other sites More sharing options...
Bill Kielb Posted October 27, 2022 Report Share Posted October 27, 2022 59 minutes ago, Pessy said: Or do I need to thoroughly wash it off? It should evaporate, but I would thoroughly wash and thoroughly dry just to get everything off. Oil from hands etc…. Quote Link to comment Share on other sites More sharing options...
Pessy Posted October 27, 2022 Author Report Share Posted October 27, 2022 Thank you all for your input. I used everyone's advice. We redid some casted pieces from scratch, we washed off the acrylic using rubbing alcohol from the others. I will load the kiln tomorrow and let you know if all went well Kelly in AK, Callie Beller Diesel and Pres 3 Quote Link to comment Share on other sites More sharing options...
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