I have been using Mercadante glass for approx 6 years. I have found it to hold it's color, rarely boil, rarely streak, coe is accurate, and it is a joy to work with. The bonus is the price. Why pay $$$$$$$$$$$$$$$$$$$ when one can pay pennies on the $ for glass that actually works correctly. I have yet to have a bunch that says it is color xyz that upon annealing or torching ends up being a mix of blue, green, white, etc...When I use color I want the color it says to end up being the color that is completed and annealed. Works for me.........Oh, btw, I have purchased from Lampworking-Tools in the past. Everything from boro glasses to tools and including their Mercadante glass. Maybe it is just the fact that I live in the east but I have yet to have a problem with the shipping costs. In fact I find the shipping cost from them to be much less than going with the west coast suppliers. Go figure.......
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