On Friday I posted an unforseen reaction I found when trying out one of my favorite color combinations. I had hoped that the problem was with CiM peacock green, which I love but can work around. Apparently, it is with the combination of this blue green and Effetre periwinkle.
This was the first bead, made on a base of peacock green with cracks surrounding the periwinkle lines.
Since peacock green is relatively demanding with regards to annealing, I hoped that switching the glass and being careful with the annealing would yield better results. The result on Effetre nile green opalino belies this. I was extra slow annealing in my Chilli Pepper just to be on the safe side. There are still cracks all around the Effetre dark periwinkle scrolls. If I didn't melt the periwinkle in, nothing bad happened, but apparently there is some stress from the glass itself so I don't expect the bumpy one I did will hold up long. I've used this periwinkle on other beads with other bases so it's just the blue greens that are a problem.
I made a small, spacer sized, bead with peacock green and CiM grumpy bear melted in to see if it would react the same way. I am thrilled to say it did not. Note the separation in the middle of the periwinkle lines is opposite what's happening with the Effetre periwinkle. It looks like the bead might be cracked, but what is happening is light reflecting on the bottom of the sunken in scrolls.
I think for kicks I'm going to do a bead of grumpy bear with Effetre dark periwinkle decoration and see what happens. This is driving me nuts.