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Ceradel Frit C 1250

Alternate Names: C1250 Fritte, C 1250 Fritte, Ceradel Frit 1250

Oxide Analysis Formula
SiO2 35.00% 2.00
PbO 65.00% 1.00
Oxide Weight 343.38
Formula Weight 343.38


The manufacturer calls this a lead bisilicate but only gives a range of values for the analysis (SiO2 - 15-40%, PbO 40-70%). Since the standard lead bisilicate is 65:35, that is what we have assigned here. We have another source that confirms that.

Related Information


Materials Frit
Materials Lead Bisilicate Frit
Materials Ceradel Frit C 1249
Typecodes Leaded Frit
Frits can contain 1% or 80% PbO so this category can be misleading, check the chemistry to find out.


Co-efficient of Linear Expansion67 (10-7/C 20/300C)
Frit Softening Point900-1100C

By Tony Hansen

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