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Wyndham

need to reconstruct a frit

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I have a frit that I can not find a substitute for. I have also never understood unity formulas as well. I'm hoping someone cal help translate this back to raw materials

The frit number is 1290 it has only 4 components  NaO .50  Cao .50  B2O3 1.00 and silica 2.oo

Am I guessing correctly that 1 part borax i part whiting and 2 parts silica would be some thing close to the frit or is there a better set of ingredients to use

Thanks

 

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Great,

1290                                      16.36%     The frit number is 1290 it has only 4 components  NaO .50  Cao .50  B2O3 1.00 and silica 2.00

Custer feldspar                  18.39

Dolomite                               17.55

whiting                                      2.50

EPK                                          16.85

Silica                                         23.95

Titanium Dioxide                    3.42

Cobalt oxide                                .74

Iron Ox                                          .02

NiO                                                 .28

It's a variation of float blue I'd like to test. The frit has thrown me off as could not find a substitute

Thanks for any help Wyndham

 

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