Main Discussion Area > Primitive Skills
Re: native pottery part 2
iowabow:
Now Conducting a density test on my one sample and looking at areas that were polished a little. The bubbles are not on the polished area. So a new test will be setup up. what I learned was that the clay held up to the water for an hour and did not desolve yet and there were lots of bubbles coming off the pot. The sample also changed the Ph of the water solution so something was reacting with the water. So did cooking pots in the past release something and change the PH of what was in the pot??... hmm dont know yet.
New test:
clay with the shell
clay with the shell polished
clay with the shell with slip
clay with the shell with slip and then polished
A density test will be conducted on these 4 pieces.
What we are testing for is the the water in the sample.
The problem is that a pot that boils water can not have water in the pot because the steam with distroy it. The shell in the clay makes it handle heat but makes the pot porous kind of a problem if you are going to put it on a fire.
iowabow:
20 hours later and the clay did not dissolve so that is good.
iowabow:
The clay rod has dried out and looks just fine.
sadiejane:
yr killing me man :)
anxiously awaiting the next installment
iowabow:
I am still working on data from the g/ml test to determine ratio mixture. I want to make sure that the process is repeatable if it works. I was thinking about making a mix if the shell mixture is dry today and I remember to take the scale to work. Here is my plan:
1 make a clay body and run test for porosity
2 if tests are positive then mix clay and age for 4 weeks to increase plasticity
3 make one pot and test in modern kiln
4 if all is going well then make pots and fire 4 of them at a time, in different type fires.
This is a long processes
5 write article and send to PA to see if they want to print it.
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