Devit and venting

[JeffP]

Your comments have been very helpful. Venting is one thing I am not doing but will try.

I have a problem with opalescent Bullseye glass in that it tends to devitrify. From research I understood that rising and cooling faster through the temps around 730 – 760 minimizes devit. Hence I tend to rise quickly to temp after strain release.

Maybe I should try making these on a prepared shelf but keep the temp down and hold longer. My earlier attempt on a shelf and not paper resulted in a worse problem with picking up the shelf separator.

I will definitely try lower, slower and vent on the shelf.