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woodfire slip question

updated sat 7 jun 03


Elizabeth Herod on thu 5 jun 03

OK, another question for the wood and salt firers. I have already read the
archives about the flashing slip.

I=B9m attending a wood/salt/pit workshop in August. I have two recipes for
flash slip, one for leather hard pots, and one for bisque.

How does the outcome vary between the two? Is it similar, different?

I can use the flash slip for bisque at the workshop, but I would need to
make the slip for the leatherhard pots and bisque the pots before I go.

Thanks for your help


Lee Love on fri 6 jun 03


Here is something you might try and do. I learned it from my Sensei.
If you texture the clay when it is soft (just before leather hard), you can put
the slip on after leather hard and then scrape it away from the high parts of
the body with a kana trimming tool. What this does is gives you a variety of
surfaces on the pots. My teacher used rope impression to make the texture.
I use paddles, stamps and cheeze cutters with twisted wires. I will also use a
needle tool when the piece is spinning on the wheel and make parallel lines
encirciling the work.

This technique gives variation and depth to the surface. If you use
stamps for impressions, you can inlay moldable clay instead of slip. After you
place the clay on the indention, burnish with a spoon. When it dries a little,
scrape with a kana trimming tool.

Lee Love In Mashiko, Japan

"Concerning all acts of initiative (and creation),there is one elementary truth
the ignorance of which kills countless ideas and splendid plans: that the
moment one definitely commits oneself, then providence moves too. A whole stream
of events issues from the decision, raising in one's favor all manner of
unforeseen incidents, meetings and material assistance, which no man could have
dreamt would have come his way." --W.H. Murry

Snail Scott on fri 6 jun 03

At 04:35 PM 6/5/03 -0400, you wrote:
> I have two recipes for
>flash slip, one for leather hard pots, and one for bisque.
>How does the outcome vary between the two? Is it similar, different?

Compare the recipes. Usually, the only difference between
a slip (engobe) for bisque and one for leather-hard clay
is the raw clay content. Recipes intended for greenware
can (natually) tolerate much higher quantities of raw
clay in the recipe, as the two will shrink together.
Recipes with so much raw clay may crack and fall off of
bisqueware, so recipes for bisque generally replace some
of the raw clay with calcined clay to reduce the shrinkage
during drying. The final appearance shouldn't differ at
all, except due to variations in application.