June 7, 2002, Newsletter Issue #93: Engobes: Colouring
Tip of the Week
Here is a simple blue engobe you can try out (but be sure to do some small tests first, before using it on any ´important´ stuff!):
Ball Clay 40
Red Iron Oxide 20
Manganese Dioxide 20
Cobalt Oxide 20
Oxide Chart:
The following chart can be used as a guide for adding percentages of oxides to engobe recipes for color results. These colors refer to results obtained in oxidatiion firings:
Cobalt Oxide Dark Blue 1.5
Copper Oxide Mid Green 3.0
Yellow Ochre Ochre 4.5
Iron Oxide Mid Tan 3.0
Rutile Creamy Tan 6.0
Iron Chromate Dark Gray 3.0
Manganese Dioxide Purple Brown 6.0
Fire in Oxidation for the above color results.
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