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In response to Karla's question : Has anyone out there used colored slip on
Karla, I've actually done what you're thinking of, in reverse. During a 4th
grade Mayan culture unit we simulated the way Mayans constructed and
decorated their pots. We made pots coil pots from red terra cotta clay.
When they were leather hard, we painted white slip over the red clay.
(Actually, it was homemade slip - white clay that was watered down). When
the white slip dried (which was very quickly), we did the scraffito designs
which showed up as white lines and shapes in the red clay. I fired the pots
according the the terra cotta specs and they all came out great! Your idea
should work well for you Karla, go for it!
I have some students making simple clay containers. They have planned some
interesting repeated designs to put around them. Rather than just carve the
designs into the clay, I would really like to cover them with a red slip and
scraffito the designs so they show up as white lines and shapes on red
ground. But I need to know how to make sure the slip will not crack off the
white clay. Can I use red clay, or do I have to use the same kind of clay and
change its color by adding iron oxide to it? I have a book that tells how to
color clay, but I'm wondering if it's necessary. I have red clay that could
be watered down and painted on if that would work.
If anyone has tried this, I'd greatly appreciate a few words of advice. Or
any good resource you have discovered. Thanks, you are always a helpful