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Ceradel Frit C 1250

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

Description: Lead bisilicate frit, Bisilicate de plomb

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
Frits are made by melting mixes of raw materials, quenching the melt in water, grinding the pebbles into a powder. Frits have chemistries raw materials cannot.
Materials Lead Bisilicate Frit
A standard frit of 1 molar part of PbO and 2 of SiO2. It is considered stable and non-leachable.
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 Expansion 67 (10-7/C 20/300C)
Frit Softening Point 900-1100C
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