Val Posted November 9, 2019 Report Share Posted November 9, 2019 So I sculpt a lot of face planters and like to use Amaco velvet beige as the base skin tone. I started having the underglaze develop small bubbles at cone 5 ( I applied at greenware & I do not apply any clear glaze over the underglaze) I spoke to tech. support at Amaco and they said most likely it was old and the gum had deteriorated. I mixed up some cmc gum and began adding gradually to no effect. Finally I added more than 1/4 cup to the pint. I got 1 good firing, then the problem was back. I am willing to throw out the rest of what I have and start over but now I am worried I will buy new and it's been on a shelf somewhere and already be old. So 2 questions 1. If I buy new how can I be sure it's not already old, and # 2. any ideas for acrylic washes or oil paint washes as a matt finish for my faces ? Link to comment Share on other sites More sharing options...
oldlady Posted November 9, 2019 Report Share Posted November 9, 2019 do not use underglaze much but i love the pot! in fact, i think i have met that lady somewhere........ Link to comment Share on other sites More sharing options...
neilestrick Posted November 9, 2019 Report Share Posted November 9, 2019 Can you post a closeup photo so we can see the bubbles? If the bubbles aren't there before firing, I'd say it's not an age issue. Plus you would notice if the gum had deteriorated- it wouldn't brush on nicely. Link to comment Share on other sites More sharing options...
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