Vince Pitelka on sat 26 mar 05
made..
Rob -
I don't know of any commercial sources of a terra sig that is worth the
money. You can find my article on terra sigillata at
http://www.digitalfire.ab.ca/cermat/education/274.html
This method really is not nearly as complicated as it first sounds, and it
definitely makes a superior terra sig. If you use this method, you will
need to purchase a hydrometer that measures specific gravity. You can get
an excellent one for a very reasonable price at the Sargent Welch website.
The website follows, and be sure to paste in the whole website with all the
underscores but with no open spaces:
http://www.sargentwelch.com/product.asp_Q_pn_E_WLS42035-A_EA_A_Hydrometers+%2D+General+Use_E_The one specified "WLS42035-A" is the right one - it has a specific gravityrange from 1.000 to 1.2220, which is exactly the range you need for terrasig. A normal glaze hydrometer purchased from a ceramic supplier does nothave nearly the sensitivity, and will not work well for terra sig.As you can see, the price of $10.25 is very reasonable, but theseinstruments are very delicate, so I would purchase at least two. When Ibought my first glaze hydrometer thirty years ago, I only got one, and itbroke on the third or fourth use. I didn't realize how fragile they are.Next time I bought two, and had them both for many years.Good luck -- VinceVince PitelkaAppalachian Center for Craft, Tennessee Technological UniversitySmithville TN 37166, 615/597-6801 x111vpitelka@dtccom.net, wpitelka@tntech.eduhttp://iweb.tntech.edu/wpitelka/http://www.tntech.edu/craftcenter/
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