Sam or Mary Yancy on thu 13 nov 03
In the airline industry and in race cars, cracks in metal are always stop drilled at the end of the crack BEFORE welding or patching. This eliminated further cracking due to heat expansion, or "working vibration before welding or "patching". Perhaps this should be done to clay/pottery too? Comments? Sam in Daly City CA.
Veena Raghavan on fri 14 nov 03
Sam,
I read about this years ago, can't remember where, and it certainly works=
.
Before mending a crack in greenware or bisque, make a small hole at each
end of the crack, then deepen the crack a little and fill with paper clay=
mender. Recipes for paper clay mender have been posted many times on
Clayart. Works for me, most of the time. I do a lot of intricately carve=
d
pieces, so saving them becomes important, because they are labor intensiv=
e.
Veena
Message text written by Clayart
> cracks in metal are always stop drilled at the end of the crack BEFORE
welding or patching. This eliminated further cracking due to heat
expansion, or "working vibration before welding or "patching". Perhaps th=
is
should be done to clay/pottery too? Comments?<
Veena Raghavan
75124.2520@compuserve.com
Cat Yassin on fri 14 nov 03
In a message dated 11/14/2003 4:56:29 AM Central Standard Time,
satima@PACBELL.NET writes:
> In the airline industry and in race cars, cracks in metal are always stop
> drilled at the end of the crack BEFORE welding or patching. This eliminated
> further cracking due to heat expansion, or "working vibration before welding
> or "patching". Perhaps this should be done to clay/pottery too? Comments? Sam
> in Daly City CA.
>
Well, I think that when you are dealing with expansion, and force, and
stresses then anything is possible! Wonder if your theory would work in child birth?
J/k!!!!
-Cat Yassin
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