mregecko Posted January 15, 2013 Report Share Posted January 15, 2013 I'm a potter with fairly little experience using underglazes -- most of my work has been high-fire stoneware with glazes and simple oxide washes. I want to start a new project that I'd love some advice on... It's going to be a color study on some sculptural pieces, and I'm thinking that I would like to use commercial (Amaco, Coyote, Spectrum, whatever) underglazes painted on stoneware as my media. However, I'm a little unsure what to do to get the surface I want... The un-glazed underglazes I've seen always come out a gritty / velvet-matte texture that's slightly unpleasant. However, I definitely don't want the surface shiny like it would be with a clear glaze over it. I love the simple, slightly fluxed sheen I achieve with oxide washes (iron, manganese, etc) over stoneware... Is there any way to accomplish this same surface texture over underglazes? I was thinking maybe a light frit wash, but honestly not sure if that would work, proportions, etc... Another thought was using a very watered down clear glaze, but this too can be a little unsure. Any advice / thoughts would be great! Cheers, -- W Link to comment Share on other sites More sharing options...
neilestrick Posted January 15, 2013 Report Share Posted January 15, 2013 You could add a little frit to the commercial underglazes. It'd take some testing, of course. At cone 6 some of them start to shine up a little bit anyway. Speedball Underglazes hold color very well at cone 6. Link to comment Share on other sites More sharing options...
Lucille Oka Posted January 15, 2013 Report Share Posted January 15, 2013 The clear finishes that may work (of course you must test and see if this is what you are looking for) is the Amaco Sahara HF series, HF-12 Clear Satin, there is sheen but not a high gloss & HF 17 Waxy White, it is a white translucent glaze that has a texture much like set pure confectioner's sugar icing. Link to comment Share on other sites More sharing options...
mregecko Posted January 15, 2013 Author Report Share Posted January 15, 2013 The clear finishes that may work (of course you must test and see if this is what you are looking for) is the Amaco Sahara HF series, HF-12 Clear Satin, there is sheen but not a high gloss & HF 17 Waxy White, it is a white translucent glaze that has a texture much like set pure confectioner's sugar icing. I don't know why a clear satin didn't occur to me... Definitely something I'll have to test. I'm still not sure it'll be the exact right answer for me, but maybe a thinned down satin clear could give the sheen I'm looking for. Thanks for the idea :-) And neilestrick, I haven't seen or heard much about the speedball underglazes... Maybe I'll buy one or two and test them out to see if they'd work for me. Great ideas so far! Link to comment Share on other sites More sharing options...
bciskepottery Posted January 16, 2013 Report Share Posted January 16, 2013 You could spray or brush a soda ash/water solution over the underglazes; that should produce a low sheen. Becareful not to apply too much or the underglaze may run (soda ash fluxes). You could also use a frit/water solutuion. Link to comment Share on other sites More sharing options...
neilestrick Posted January 16, 2013 Report Share Posted January 16, 2013 The clear finishes that may work (of course you must test and see if this is what you are looking for) is the Amaco Sahara HF series, HF-12 Clear Satin, there is sheen but not a high gloss & HF 17 Waxy White, it is a white translucent glaze that has a texture much like set pure confectioner's sugar icing. I don't know why a clear satin didn't occur to me... Definitely something I'll have to test. I'm still not sure it'll be the exact right answer for me, but maybe a thinned down satin clear could give the sheen I'm looking for. Thanks for the idea :-) And neilestrick, I haven't seen or heard much about the speedball underglazes... Maybe I'll buy one or two and test them out to see if they'd work for me. Great ideas so far! The other great thing about Speedbal Underglazes is they are less expensive than Amaco Velvets and such. Link to comment Share on other sites More sharing options...
Chris Campbell Posted January 16, 2013 Report Share Posted January 16, 2013 You could spray or brush a soda ash/water solution over the underglazes; that should produce a low sheen. Becareful not to apply too much or the underglaze may run (soda ash fluxes). You could also use a frit/water solutuion. Could you share the recipe proportions for that soda ash/water spray? Link to comment Share on other sites More sharing options...
bciskepottery Posted January 17, 2013 Report Share Posted January 17, 2013 You could spray or brush a soda ash/water solution over the underglazes; that should produce a low sheen. Becareful not to apply too much or the underglaze may run (soda ash fluxes). You could also use a frit/water solutuion. Could you share the recipe proportions for that soda ash/water spray? Gosh . . . Maybe a teaspoon or so in a cup of water, heated in a microwave to help with dissolving soda ash. Never really paid much attention to quantities. I've done this in electric kiln, cone 6 on bare white stoneware. Link to comment Share on other sites More sharing options...
bigDave Posted January 17, 2013 Report Share Posted January 17, 2013 I don't know why a clear satin didn't occur to me I use the laguna clear matte, funny thing is youd think a light coat would be better, nope light coat goes glossy, only heavy does it become matte just FYI http://www.lagunaclay.com/glazes/moroccansand/ms67.php Link to comment Share on other sites More sharing options...
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