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Member Since 14 Feb 2014
Offline Last Active Yesterday, 07:32 PM

Posts I've Made

In Topic: Quick Question: Sea Shells - Cone 6 - Which Type?

18 April 2017 - 07:35 PM

If you didn't know about crushing shells for pottery, you should burn the shells first...then you should be able to crumble them in your hands. As for the percentage, figure 35%-50% or by the look! :). But expect the opportunity to watch it disintegrate after a while.

In Topic: Quick Question: Sea Shells - Cone 6 - Which Type?

18 April 2017 - 02:53 AM

The way I use shells the most in the associated with hand built pottery are ribs. If you can find one that is smooth and somewhat oval and the right size, it can be used as a rib. If you flip the same shell over, its a scraper. The shell tool is unlikely to wear out in your lifetime! :). If you find a shell with a wavy edge it can used as a rocker stamp for texture and designs.

See ya

In Topic: Quick Question: Sea Shells - Cone 6 - Which Type?

17 April 2017 - 09:23 PM

Shells are made from layers with a type of adhesive or bonding agent between the layers. The adhesive burns out above 451 degrees and the layers change to calcium hydroxide over 951 degrees. Calcium hydroxide is a powder that absorbs moisture from humidity, expands, and if there is enough crushed shells in the clay... The vessel will disintegrate with in a year! I know this is true about mussel shell... And assume sea shells are the same/similar!
But then it doesn't hurt to experiment. :)

In Topic: What Type Of Sand? To Add To Clay.

10 April 2017 - 10:07 PM

There was in the 18th century up north a type of crock called coarse-ware and it was wheel throw with sand in it. Any sand that is the same size is probably what you're looking for. A couple of weeks ago I bought some "course sand" from the local sand and gravel company..its mixed with the larger particles a little larger than rice! Its for hand building! Do more experiments and let us know the results!!! :)

In Topic: How To Start Making My Own Wood Ash Glaze

10 April 2017 - 06:50 PM

There was a glaze heading in the www.potters.org site long ago when it existed... There was a fake ash glaze recipe there... Pick an easy ash glaze to try then experiment... Then branch out from there...