Can I reheat a casting if I'm out of alloy?

[Trey]

We ran into a problem today - thought our gold shipment came in but it was something else. We used High Temp Whip Mix investment. It was heated up. Can we let it cool and reheat tomorrow to cast? I hate to wax the crowns again.

Thanks,
Trey

 

[Fogember]

Had that happen! I've left the ring in the hot oven til the next day. e the casting when the alloy arrived. Didn't seem to affect the fit. Nothing ventured nothing gained.

 

[2thm8kr]

Sometimes you will see the effects of investment break down doing this.
50-50 chance it works perfect. Worse case scenario, you wax them again.

 

[Tayebdental]

Yes, l assumed the the alloy will arrive in a timely fashion as well, but it did not. I reheated the ring the next day and casted with no visibile harm. Those were single units not sure on long span bridges thou.

 

[JMN]

Had the same issue a few times. Running it up cold from room temp the next morning worked out fine using GC Fujivest II.
Once with a UCLA Talk about sweat, I'd checked the wrong metal box.

 

[Patrick Coon]

It would be safer to leave the ring in the hot oven till the next day. If the investment is kept at a stable temperature there is less chance of stress than going from the heat-cool-heat cycle. You shouldn't have to worry about any breakdown of the investment in the time span of a day. I would worry if we started getting to the 36hour or greater point.

 

[Trey]

Thank you everyone for your input. We allowed it to cool overnight and will try casting today. We'll see how it goes and I'll try to report back. Thanks & Merry Christmas!

 

[MasterCeramist]

I have done that before. Left ring in oven and turned oven off for a slow cool. Ran it back to temp the next day and it went fine.