Old frit

[Lbegley]

I'm cleaning out the chemical storage at the college I work at and found a bunch of old frits that I'm not familiar with. 

Frit 71, 

550

3292

740

76

Anyone familiar with any of these?  Know their modern equivalents?   Whether or not they're leaded?

Thanks!

[Fred Sweet]

Doing a quick search in the Digital Fire website under Materials/Frits yields the following (note: other than the Ferro Frit, the May be comment is the closest I could find):

 

3292-

Ferro Frit 3292

 

This is a USA pottery frit, Ferro now calls it Frit 3292-2. Useful addition to first fire sanitary ware. Balanced, can make up the bulk of a recipe. Out Bound Links.

 

71-

May be Hommel Frit 71, a leaded frit.

550-

May be Hommel Frit 550, a leadless calcium borax frit.

740-

May be Pemco Frit Pb-740, a leaded frit,  a high zinc frit for matte glazed cone 06-4.

76-

May be Fusion Frit F-76, a leadless frit.

 

Regards,

Fred

[Lbegley]

Thanks Fred!  I googled the frit and numbers and couldn't find anything!  

[Fred Sweet]

Google isn’t always your friend. Can be a little too distant from the source.

Note that I didn’t follow those leads all the way back through the Digital Fire site.

The starting page for Frits is: https://digitalfire.com/4sight/material/x.html

Most, if not all, have hot links which should get you to more information, including some potential substitutes.

Regards,

Fred

[Mark C.]

You may find some of the frit numbers from long ago now have modern eqivilant numbers-many of those old Hommel numbers equal new ferro numbers.Laguna clay has a nice chart on this in their catalog online.

here is the link

http://www.lagunaclay.com/catalog/pdf/lcc_frit.pdf

[Lbegley]

18 hours ago, Fred Sweet said:

Google isn’t always your friend. Can be a little too distant from the source.

This is true!!! I've found a lot of glazed donut and ham recipes when looking for a glaze recipe!