Quote:
Originally Posted by Katia
For me it is an issue of first, recipes and second - marketing. Or may be vice versa. But anyway - if, say, Spectrum is successfull in fusing glass with their system 96 for fusing it is much easier (and reasonable) to add rods to the assortment than to go into competition with Bullseye or Uroboros in 90, where BE is very good as well. Both companies produce glass of high quality but the buyer will stick to one of them or pay both - no other way out. 104 comes from Italy - probably there was different sand, additives, the development of the craft in general. But the competition in 104 makes me guess that this issue heavily depends on the colour pallete and cost of introducing new or unique colours. COE is not an absolute value anyway, it is approximate always, compatibility is what really matters.
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All of the Spectrum glasses are 92 to 96, tested compatible or not. It's just another way to help you spend your money, as far as lampwork goes anyway. LOL