Coatings by Sandberg is good quality. The premium colors are generally harder to burn off than the regular ones. I think that the premium colors are made with more passes of the coating machine than the regular ones, so the coating is actually thicker. CBS doesn't sell directly in quantities smaller than a half sheet, but the distributors who sell CBS usually identify it as CBS dichro. Go to the Coatings by Sandburg website to view colors and to figure out which are the premium colors.
Avoid the Candy Apple and Black Cherry colors until you've gotten some experience with dichro. Those colors have a reputation for being more likely to burn off than others. I'll admit, though, that I tried a sample of Candy Apple at the Gathering that was no trouble at all and came out beautifully.
Dichro strips that have been "fused" in the kiln seem to be easier to use, although I've talked to people who think it makes no difference. I'd try the fused strips and see how those work, and once you're comfortable, try working with unfused pieces to see if you see a difference.
The key to dichro is patience. Warm it gently and slowly before attaching to your bead, and try not to get the bead too hot after you've applied the dichro. I've fried plenty of dichro even after it's on the bead.
As soon as you apply the dichro, use a metal tool to push some clear glass over the sides and end of the dichro. The dichroic part isn't glass; it's some coating that was developed for the space program. If you don't seal it with clear glass, the coating will creep out and scum when the heat hits it. Sometimes you can pick off the scummy bits.
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