I'm using my red undercoat. I know you are suppose to put it on, then put the clear overglaze over it, then fire. My question is if you can fire it first without the overglaze on it to make sure the coverage is correct, then fire again with the overglaze.
Yes you can. I put underglaze on greenware and bisque it. Alternatively you can underglaze bisqueware and fire again to about 700C. The brush strokes and look of underglaze never shows entirely until you have glazed and fired it though, when of course it is too late change. The best thing is to do lots of testing. Different underglazes react differently and require more or less to be applied. Also some reds and purples react badly to higher temperatures. Its all about testing and practice :o)
i agree with Annmarie, best way is to paint the underglaze onto greenware then fire. (some maverick colours need 4 instead of three coats)when it is bisque, wet the piece and you will see if there are any patches---if so give it another coat and allow to dry thoroughly before applying the glaze, doing the first coat gently so as not to "wash" off the unfired layer of underglaze.
Thanks for the replies and advice. I'll use the underglaze on the greenware next time. It's too late this time. I'm taking the items to be fired tonight, so we'll see what happens.
*Catch you on the flipside*Have something to add? Share your thoughts — no account required.
Ask the community — no account required