August 22, 2003, Newsletter Issue #153: Underglazes: More tips
Tip of the Week
Some colours have shorter shelf lives than others. They may become like a gel if too old. You can salvage these by stirring or even running them through your blender. Add a drop of water at a time to get the proper consistency.
The colour in the jar of underglaze is not the resulting colour when fired.
You can change the colour of underglazes with the addition of one-strokes (pure colour pigments) in varying quantities. Since you still will not be able to tell the colour you have made until after the piece is fired, it is recommended to make a test-firing of piece to be sure the colour is what you want.
Underglazes should be used only on greenware. They can be used on bisque however, and fired before a glaze application.
Always wipe off rims of paint jars before storing. Store jars upside down. This will make opening and mixing easier.
To help remove the lid from a jar, place it on the floor and roll the top of the jar with the ball of the foot back and forth several times. If you get tired of shaking and mixing those jars of paint, try adding a few ‘split shot’ sinkers to each jar.
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