View Single Post
Old 12-05-2019, 04:31 PM
Greg Vriethoff's Avatar
Greg Vriethoff Greg Vriethoff is online now
Join Date: Jan 2007
Location: Aarde
Posts: 2,201
Greg Vriethoff is on a distinguished road
Originally Posted by Bob Meyer View Post
We've found that we do have to pre-heat the Kugler Free - it pops like firecrackers going into the furnace cold - but pre-heating didn't turn out to be the ordeal we anticipated - no popping whatsoever going in, and great quality glass in the morning.
It is also important to note something else about popping. When you throw large chunks of any cullet into a furnace the shattering from thermal shock introduces thousands of tiny gaps that trap air. You're introducing more opportunity for bubbles that are only going to force you to fine for longer at higher temps.

I'm going to guess this is just one factor that may be contributing to better glass quality for Bob.
Reply With Quote