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Old 03-30-2005, 10:24 AM
Robert Mickelsen Robert Mickelsen is offline
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Join Date: Nov 2002
Location: Melbourne Beach, Florida
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Originally posted by Pete VanderLaan
When you say it is dead on, who measured it and how. Is it a pull test? I simply do not trust pull tests in opal/clear matches as even remotely reliable. They only work in formulas of similar composition. It would require dilatometry or a ring or trident seal test to get accuracy here. Chrome glasses are refractory in nature and the problem is compounded by opacity. If it is a boro supplier, I have so far not been overwhelmed by the current group of suppliers being terribly thorough. It's a comparatively young industry when it comes to color and actual batching of colors.
I know the green was tested on a dilatometer and was on the money. The color manufacturers have tried for years to solve the problem to no avail. You are absolutely correct in what you say about the present group of suppliers.
Robert Mickelsen
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