eoteceramics Posted September 28, 2013 Report Share Posted September 28, 2013 Hi, quick question Is it possible to use coloured slip over a glazed and fired piece? I missed a bit the first time around. Thanks Link to comment Share on other sites More sharing options...
Benzine Posted September 28, 2013 Report Share Posted September 28, 2013 I'm not going to pretend to be an expert, as I've only used a limited amount of products, but from my experience you do not use colored slips/ underglaze over glaze. The results I have seen, cause the underglaze to look "foamy", and generally look terrible. Of course, if you used a low fire underglaze, it would melt at high fire temperatures, so in that case it might work. Link to comment Share on other sites More sharing options...
Venicemud Posted September 30, 2013 Report Share Posted September 30, 2013 I imagine it would depend upon the slip composition. I have used commercial and home mixed underglazes on fired pieces successfully - the trick is getting the underglaze to stay by coating the piece with dilute Elmer's glue or by warming - and refiring to the original glaze temperature (cone 6 in my case). If the slip is all or almost all clay I would not expect it to work, but some slips approach being underglazes in their composition, with feldspars and fluxes added. I have recently taken up on-glaze painting (china painting) and find this a much quicker and easier way of recovering from booboos. Link to comment Share on other sites More sharing options...
oldlady Posted September 30, 2013 Report Share Posted September 30, 2013 how was the slip made? is it simply wet clay with color added or is it a formula with several ingredients? i know that you cannot do what you want if it is just wet clay with color. where did you get the slip? lots more info would help. Link to comment Share on other sites More sharing options...
neilestrick Posted October 1, 2013 Report Share Posted October 1, 2013 Slip is clay, and so it must follow the same rules of attachment as any other clay- nothing harder than leather hard. If you trail slip onto glaze fired, bisqued, or bone dry work, it will flake off as it dries. Underglazes are a completely different animal, and are formulated to work on leather hard, bone dry or bisque. They may very well work on glazed pots, too. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.