Can be easily applied to wet clay, greenware, or mature Cone 04 bisque (1060☌) Try two finish possibilities: When left unglazed these colors have the rich textural appearance of velvet when covered with AMACO clear transparent matte of Clear Gloss they intensify in color. Some colors remain true as high as Cone 10 (1300☌).
Velvets fire true-to-color as a Cone 05/06 (1020☌-1040☌) underglaze or fired to Cone 6 (1230☌). CLEAN dry bisque (no dirty, greasy fingers), wipe bisque with damp (not wet) sponge.Saturated color, dependability, and versatility make Velvets as popular for professionals as they are for children. Stir the glaze (30X at least for the first time, stir again right before each use)ĭip, pour, or paint on glaze to ‘postcard’ thickness. Measure your piece and add the right number of glaze stamps. No glaze down the sink…wash in glaze wash bucket. PLEASE USE A NOTEBOOK and write down exactly what you did to decorate and glaze the piece. What glaze(s), what order, how many seconds did you dip the piece for, did you dampen it first, what did the glaze coat look like, how far up or down on the piece did each glaze go…. just make a rough sketch and label the glazing steps. Glazes look very different if they are thin or thick or if they are over or under other glazes. You think you will remember, but you won’t remember exactly … and one day you will have an amazing piece and everyone will want to know how you glazed it….be prepared to share that information!!!!ĪDD NOTES TO THE STUDIO BINDER. If you had a great glaze combination or great glaze result please share it. Likewise if you have a problem like crawling or crazing or running or if you think a glaze is too thick, too thin, too lumpy, leave a comment so it can be investigated and maybe fixed. Too thin and glaze can be rough and dry, ugly, and sometimes a different color. If your piece looks bad after firing, you can sometimes add more glaze and fire again.
Bubble crackle glaze crack#
Glaze coat too thick → crawling, crazing, running, bubbles: Too thick is very bad: Too thick and glaze can crawl and even crack off the piece (sometimes in the kiln) leaving bare spots and messing up the kiln shelves. Too thick can also run off the bottom of the piece sticking it to the kiln shelf….ugggg. Very thick glaze coats tend to develop cracks (crazing) after firing (oribe is especially prone to crazing) Too thick on the inside can cause the glaze to have bubbles where it pools. Just right is about ‘postcard’ thickness. Rough guidelines: one dip ‘instant’ to 8 seconds, or two dips (‘instant’ to 2 sec.
each), or a single pour, or 2-3 coats with a brush with each coat brushed in a different direction and waiting for the first coat to firm up/dry before second coat. Pot too dry → too thick glaze coat, poor coverage in texture, glazing may disrupt sticking of an earlier glaze coat, crawling from dust or grease is made worse Pot too wet → too thin glaze coat, poor glaze sticking, slow drying: Too wet can happen when you have already put on one glaze coat, or when the piece is extremely thin, or if you washed the bisque fired piece Use a pin tool or knife to scratch through the glaze to find out how thick it is. Use a damp sponge to clean off bisqueware before glazing. For two different glaze coats, let the first coat get mostly dry (dry to the touch, but not ‘bone dry’) then add the next coat. What is “crawling”? Crawling is when the glaze pulls away from the pot (and sometimes falls off). Glaze shrinks when it dries (just like dried mud). If the glaze shrinks a lot and the pot of course doesn’t shrink, then the glaze will crack as it dries.
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