Pieces that are too large to fit in the glaze bucket can be poured. Hold the piece over a large bowl and pour glaze onto the pot. Try to get the glaze layer even by pouring steadily and rotating the piece. Again, any overlapping areas will usually show, so you can use this decoratively. For cylindrical forms or mugs, it's usually best to glaze the inside by pouring. Pour the glaze into the pot and slowly rotate it as you pour it out. The outside then can be glazed after the inside dries.
The same wax we use on the bottoms of our pieces can also be used decoratively. The wax can be applied to the bisque directly or applied on top of a layer of glaze. Any glaze applied afterward won't stick to the wax. Avoid trying to be too fine with wax resist. Very thin lines and small areas don't shed the glaze as well as larger areas.
Crystal glazes: Black and blue with silvery spots
This glaze can be a little tricky, but when everything is OK it is very good. You must try out the right thickness, and know that it will run if too thick. It is opaque or half transparent, glossy or matt with silvery or (blue) black crystals. Make a lot of tests before you give it up! 1270oC with ½ hour at top temperature.
nepheline syenite 69,25
zinc oxide 5,77
wollastonite 11,51
magnesium carbonate 3,85
Albany slip (the real thing) 7,70
rutile 1,92
copper oxide 3,08
cobalt oxide 3,08
vanadium pentoxide 2,31
Glaze can be painted on, and this offers enormous potential for decoration. Any brush can be used, but glaze mops, flat lacquer brushes and Japanese hakes are particularly useful for covering large areas.
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Guru Spotlight |
Heidi Splete |