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  #15  
Old 05-03-2018, 10:21 AM
Dan Vanantwerp
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"the formula is only relative to itself and other similar batches"

That's a much better way to put it. However, when you're trying to match a clear as I am it seems like the rules have to be bent a bit. Your observation that a LEC of 91 is needed for a 2.5% phosphate and 87 is needed for a 5% is showing a trend where the spreadsheet says one thing and the glass does another. My results seem consistent with yours in that the original formula at 94.1 is not compatible with Cristalica. We'll see if a straight-forward drop of LEC to 91 makes all the difference.

Both Pete and Dave make their own clear and colors. They found their clears to be compatible with the straight Brossphate formula. Could be that their clear formulas are a better match to Brossphate. Pete's is much different from Cristalica as he has described. There is more than COE to compatibility as your results make clear. That their clears are also compatible with 96 colors would seem to make them a better choice. Who knows how the Brossphate (@91 LEC) is going to react to a 96 COE color when the LEC is pushed down just to fit the Cristalica.
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