BlackandWhitedogpottery Posted January 20, 2016 Report Share Posted January 20, 2016 I pretty sure I have contamined my ^6 white glaze with specks of granular manganese or Speckled Buff. Can I seive a glaze to remove contaminants like clay particles? Perhaps.. hoping.. Also. When using my white glaze on my ^6 stoneware, does anyone ever have a light green haze? Not like a copper carbonate painting haze but a tinge of light green that turns the bright white glaze into off-white. Thank You Link to comment Share on other sites More sharing options...
Bunnybaer Posted January 20, 2016 Report Share Posted January 20, 2016 Do you mean the powder to sieve? Of course you ca do it. If the spots are big enough you´ll be successful. Although -maybe it´s getting interesting if you leave it so or is it too much? The problem with white getting green shined, yes I nknow that, too. Sometimes it happens on clay wich is colored like sand. Don´t know how it is called in english, we call it creme in german. or lederfarben. liek leather. Then sometimes I have a light shine of green or yellow. If I heat up the oven, push the temparture higher, then it´s gettin better. But the flood is horrable.... Link to comment Share on other sites More sharing options...
Callie Beller Diesel Posted January 20, 2016 Report Share Posted January 20, 2016 Sieving will work only if the contaminant particles are larger than your sieve mesh. You might be able to remove some, but probably not all. With the glaze, can you post a recipe, so we can help troubleshoot? Link to comment Share on other sites More sharing options...
Babs Posted January 20, 2016 Report Share Posted January 20, 2016 could be from fuming in your kiln from previous or current firings... Link to comment Share on other sites More sharing options...
GiselleNo5 Posted January 20, 2016 Report Share Posted January 20, 2016 If you're not able to get rid of it, I would say add an ingredient to cause speckling and a bit of green or blue colorant, that way it's uniform and you don't have a batch of unusable glaze! Link to comment Share on other sites More sharing options...
GiselleNo5 Posted January 20, 2016 Report Share Posted January 20, 2016 ... *whispers* Can ... can you do that? Link to comment Share on other sites More sharing options...
Tyler Miller Posted January 20, 2016 Report Share Posted January 20, 2016 could be from fuming in your kiln from previous or current firings... What I was thinking. Copper likes to fume. Link to comment Share on other sites More sharing options...
MatthewV Posted January 21, 2016 Report Share Posted January 21, 2016 Adding cobalt carbonate is a way to "fix" a glaze bucket by making it blue instead of clear/white/other light color. About 1% should turn it a pleasant shade of blue. Cobalt oxide (0.2-1%) will make it a speckled blue which is pretty nice if the original recipe was white. It is very unlikely you could sieve out an ingredient. The process will just mix everything in so the color is smooth instead of speckled. Rocks, bits of bisque and debris will be all that stays on the other side of the screen. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.