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Creative Glazes
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Ceramics 101
The Red-Green Dilemma
In the past it wasn't a good idea to mix red (lead
based) and green (copper based) glazes on the same piece. Even firing red and
green in the kiln at the same time could cause problems and ruin the red glazed
piece. Reds came out grey or black, sometimes even clear. With the advent of
the un-leaded glaze those times are definitely in the past.
Now, using
Envision glazes, you CAN put red and green glazes on the same piece. Envision
glaze does not contain lead, so your reds will not be affected by your greens.
Envision reds can be fired in the same kiln-load as Envision greens or other
colors with no special precautions or adverse effects. And, because it has no
lead, Envision reds can even be fired in the same kiln-load as non-Envision
greens.
Your other choice, if you wish to apply red and green on the
same ceramic piece, is to use Concepts Underglaze for Bisque. These colors also
contain no lead and so are unaffected by other colors. No special firing
precautions are required.
See the Ceramics Insider Newsletter for
November 2001 for tips on using Red
Coats underglazes.
Update!!
Duncan now offers a fantastic red underglaze which
can be painted on greenware and fired with any other color! We love the new
CoverCoats underglazes CC194 Red
Wagon and CC206 Neon Red. Paint three coats on greenware. Fire to cone 04.
Clear glaze with your choice of GL612, IN1001, SN351 or CN2000D, then fire to
cone 06. Beautiful, brilliant color every time. Food safe and
non-toxic.
If you prefer painting on bisque, try one of Duncan's new red
Concepts CN074 or CN507. Or
Mayco's Stroke n Coat SC73
or SC74. Bright, brilliant, foolproof color. Food safe and non-toxic!
Page 9 - Ceramics 101
Simple, Secure, Convenient - Creative Glazes.
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