New molds

[cindabr]

I bought some a couple molds. 2 plates and a bowl. The bottom is stamped with........... Do not heat over 250 degrees/per hour

This seems to me that it'll take forever to get where I want to slump.

Correct or incorrect??

Thanks

[Marty]

Actually, that's pretty conservative for a slump, especially if you've got 2 or more thicknesses (1/4"+). I slump 3/8 to 5/8" and have learned (the hard way) to slow slump @ 100dph.

Slow man Marty

[Lynne Chappell]

Some molds thermal shock rather easily. That's a pretty slow rise. I usually go 300 to 400 depending on the size. But I've cracked lots of molds too.

[Joanne Owsley]

Isn't it possible that you'd only have to go that slow up to a certain temp. Then you could increase the ramp rate.
Just a thought.
~Joanne

[dee]

I bought some a couple molds. 2 plates and a bowl. The bottom is stamped with........... Do not heat over 250 degrees/per hour

This seems to me that it'll take forever to get where I want to slump.

Correct or incorrect??

Thanks

the kiln goddess is determined to teach patience i think - when in doubt, go slow, i can get a slump into a ceramic mold at 1150 or 1200 deg depending on which kiln i use. i would rather go slow and get desired results than go fast and give the kiln goddess the opportunity to mess with my work ;P
D