"properly annealed in a digital kiln."

"properly annealed in a digital kiln." You can say this until the cows come home. This is not a guarantee, even though most people would think it is implicit in the statement. A properly performed annealing cycle is important but what may there be in the glass that would prompt the cows to stay away from home? Pretty simple; all materials as far as I know shrink and expand at different rates including different types of glass and their associated colors and taking this into account, you may have conflict with the clear of a certain type of glass and its colors associated with the clear. the colors will have COE's that will differ higher or lower than the clear thus setting up a conflict. The finished "properly annealed in a digital kiln" will have some stress in the glass. These pieces will be just fine down the road. However you may decide a piece of glass that lived just fine on the sideboard for many years until you decided that it would look even better in the south facing bay window. What would be wrong with this... you now have put the glass in a new environment where there may be higher and lower cycles of heat, stresses that may crack the glass even though it was annealed properly!