Thread: Color bubbles
View Single Post
  #42  
Old 11-06-2017, 04:14 AM
David Patchen's Avatar
David Patchen David Patchen is online now
Registered User
 
Join Date: Sep 2005
Location: San Francisco, CA
Posts: 1,898
David Patchen is on a distinguished road
Quote:
Originally Posted by Pete VanderLaan View Post
Mark talked about cad/sel reds in fluorine that started off compatible in his work and by the time he was done, they were no longer compatible. The effects of heating and cooling repeatedly in a glass does often change them. While John is really cautious about using Hagy seals to determine mismatch, those efforts can sometimes be defeated. The description of the black makes me think of those circumstances.
This is why I never use cad/sel colors in murrine. Too many heat cycles blows the fit. I got this tip from John C a decade ago.
Reply With Quote