I'll post more about the holiday soon...
the formula I used is one I was given while in college:
Shrinkage Percentage of clay = 100 - shrinkage % = X/100 = Y
Finished size required divided by shrinkage allowance = size to make
example: if the clay has 8% shrinkage then 100 minus 8 = 92
92 divided by 100 = .92
if finished size required is 12cm then the size to make now is 12 divided by .92 = 13.04
So I drew up a new template to the new size and they are now drying!
Thanks for stopping by... more posts soon I promise :^)
Anna
6 comments:
Welcome back. Love that hanger, and will be interested to see it as it progresses.
thanks EC... so far so good :)
sorry to hear about your little black cat..
Ugh. Shrinkage. For straight forward things I made and twice fired a clay ruler for a quick estimate. But I really need to learn how to do it mathematically!
Hi Anna MB
I hope this post helps...
Still good to do your own clay test but then I still needed to work out what the raw size needed to be.. good luck.
I really should print this out! My brain, such as it is, emits smoke when I see equations (school mathematics did permanent damage!), however... what you have here looks very useful. Thank you!
Hi Peter
I had awful maths teachers in primary but much of the damage was turned around by a brilliant fellow in High School but I'm no mathematician.
I hope this helps..
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