Friday, June 19, 2009

Fire Away!

Today I woke up to find that everything I had hoped would be bone dry by morning in fact was, so I just closed the lid on this next bisque load and fired up the kiln. There are a few shelves stacked beneath this one with more bowls and stakes and some bud vases, I think. Funny, I must have a version of kiln load amnesia…once I pack it, I forget what I’ve put in there.

Clay work is time consuming. I think what most people don’t realize is that drying the finished piece from its wet, plastic stage to sufficiently bone dry for bisque firing takes a long, loooong time. For smaller pieces like my tiny bowls, I can sit them in front of a fan to speed up the process with no ill effects, but for flat pieces and larger pieces especially, drying must take place slowly under plastic covering and over the course of several days to prevent warping. This is because the water content of the clay is evaporating and bringing the clay particles themselves closer to each other in the process. If a piece is exposed to air and dried rapidly, the clay particles align quicker on the top than they do on the bottom and this is what causes the warping. In some cases the warping only shows up after the bisque firing (surprise!), so I’ve learned to be very careful and patient during the drying stage.

Next, adding color glazes. Stay tuned!

5 comments:

Monica said...

Sometimes it's so hard to be patient when you're wanting to see the piece in its finished stage!

Dawn of LaTouchables said...

Oh, Jill, that is so time consuming, and these things look thrilling, all ready to go! It made me gasp out loud!

Sigmosaics said...

yes, i have much admiration for the clay people, it is a long wait indeed! Looks like an interesting firing and i look forward to seeing the results :)

zehava said...

What is the item at the bottom left side of the photo (looks like something flat with raised shapes attached)? And the colored pieces next to it? And did I mention that I miss you?

glazedOver said...

Z-bird!!!!! Oh I miss you *TOO - terribly!!

On the bottom left is a stack of custom order plates with some eccentric unglazed buttons sitting on top and just to the right are some more buttons with underglaze colors. (The buttons are for Dawn of LaTouchables, just above!) I unloaded the glaze kiln today so I'll be posting the new pieces over the next few days. Stay tuned!