Helpful information for potters about FERRO FRIT numbers often quoted variably in glaze recipes around the world.

These are the Frit numbers commonly in use in Australia. For example, in the USA, there is a frit #3110. In Australia, the equivalent is #4110. Shown are the numbers and their revisions. In some cases (---), there are no current references.
 
Frit Number with Revisions. (read from L to R) Description Temperature
oC
 Temperature
oF
 530     4101  ---        
 938  4193     Clear, hard Barium borosilicate frit 1040-1100 1904-2012
 1212  1081 2244 2954 Calcium borosilicate frit. Replacement for Colemanite. 1050-1160 1922-2120
 1078  3110 4110   Soft Sodium borosilicate frit. 1000-1060 1832-1940
 3124  4124     Calcium borosilicate frit 1040-1100 1904-2012
 1057  3271 4171   Calcium borosilicate frit 1040-1100 1904-2012
 1085  3302D 9146 9102 Dense Zircon white frit 1040-1100 1904-2012
 4364  4064     Lead bisilicate frit 950-1080 1742-1976
 1077  3134 4508 4108 Calcium borosilicate frit- Raku special effects 1040-1100 1904-2012
 4616  4103  ---   Zinc bearing borosilicate frit 1040-1100 1904-2012
 4712  4113     Hard clear borosilicate frit 1040-1100 1904-2012
 1012  5301
 501E34		 5325P 4194 Soft Sodium borosilicate frit- Raku glazes 900-1060 1652-1940
             
With thanks to The Pugmill Pty. Ltd., Walker Ceramics, Australian Fritted Glazes by Stan Eley, and everyone on the Net.  nullus auctoritas data.  Peter Stephens 2002. www.oocities.org/peter_stephens

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