Marcia Selsor on wed 16 aug 00
You can substitute Yellow Iron Oxide for yellow ochre according to Chip
at the Clay Business at Archie Bray.
Marci in Montana
-finally a cool evening
Wade Blocker wrote:
>
> Andie,
> You have to be my age to still own some of the listed ingredients.
> The felspars you listed are no longer available. They are perfectly
> safe. They are potash spars. Substitute Custer in the recipes.
> Yellow ochre - Fe(OH)3. The natural colors range from yellow,tan,brick
> red to brown. Ochre is perfectly safe to use in stains, slips and clay body
> giving typical iron based colors.
> Substitute Gerstley Borate for Colemanite.
> Granite powder - is similar to Cornish stone and kaolin
> Slate powder - slates are derived from claysand are used in making
> iron rich glazes. Available as dust from quarries or cutting workshops.
> Calcined slate powder has been heated.
> Epidote powder (doubt very much if you will find this or need to use
> it)is a mineral common in many crystalline rocks, consisting mainly of
> the silicate of iron and lime,and has a peculiar yellowish and green color.
> Tom Buck might be able to help here.
> Traprock 50 mesh - powder that is fine enough to go through a 50 mesh
> sieve - substitue coarse silica sand.
> Hope this helps. Mia in hot ABQ
>
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--
Marcia Selsor
selsor@imt.net
http://www.imt.net/~mjbmls
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Wade Blocker on wed 16 aug 00
Andie,
You have to be my age to still own some of the listed ingredients.
The felspars you listed are no longer available. They are perfectly
safe. They are potash spars. Substitute Custer in the recipes.
Yellow ochre - Fe(OH)3. The natural colors range from yellow,tan,brick
red to brown. Ochre is perfectly safe to use in stains, slips and clay body
giving typical iron based colors.
Substitute Gerstley Borate for Colemanite.
Granite powder - is similar to Cornish stone and kaolin
Slate powder - slates are derived from claysand are used in making
iron rich glazes. Available as dust from quarries or cutting workshops.
Calcined slate powder has been heated.
Epidote powder (doubt very much if you will find this or need to use
it)is a mineral common in many crystalline rocks, consisting mainly of
the silicate of iron and lime,and has a peculiar yellowish and green color.
Tom Buck might be able to help here.
Traprock 50 mesh - powder that is fine enough to go through a 50 mesh
sieve - substitue coarse silica sand.
Hope this helps. Mia in hot ABQ
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