Fritless Clear 04 Recipe

[Patat]

Hi,

I'm wondering if there are any lowfire gurus out there that can help me. I usually do cone 10 redn, and don't have many lowfire recipes that don't include some sort of frit. 

In Malaysia there are no suppliers for frits (or even wollastonite)...I can get Laguna Borate though, so I need to work with that. I was thinking of trying an old Birdsall-Worthington recipe based on Gerstley, I had trouble when I tested it years ago as it had some scumming problems (but that might have been Gerstley related). Anyway, any suggestions would be appreciated. Thanks!

[Dick White]

Try this:

Gerstley - 50% (or your LagunaB)

Kaolin - 18%
Silica - 32%

[TJR]

Hi,

I'm wondering if there are any lowfire gurus out there that can help me. I usually do cone 10 redn, and don't have many lowfire recipes that don't include some sort of frit. 

In Malaysia there are no suppliers for frits (or even wollastonite)...I can get Laguna Borate though, so I need to work with that. I was thinking of trying an old Birdsall-Worthington recipe based on Gerstley, I had trouble when I tested it years ago as it had some scumming problems (but that might have been Gerstley related). Anyway, any suggestions would be appreciated. Thanks!

Hey, Patat;

Do you still have the recipe for that Pam,Tim clear? I used it for a number of years. Known in Canada as Worthington clear.Pam and Tim come out of the Nova Scotia college of art, and have their own successful low-fire functional pottery business.

One of the problems with a lot of low fire glazes is that they eat pinks and purples. If memory serves me correctly, this Worthington glaze did not have this problem.

It was also not super shiny like a lot of the fritt glazes.

I suggest you revisit this glaze. Possibly add a bit of barium carb. to stop the scumming.

TJR.

[Patat]

Hi Dick,

I'll definitely try that, it looks promising.

 

Hi TJR,

Sure do, It's 

Gerstley Borate 55%

EPK 30%

Silica 15%

 

I have photo's of test tiles for it here

https://www.flickr.com/photos/expatat/albums/72157655310503700/page1

You're right, BaCO3 does fix it, I noticed I did a line blend (test 39 in the album) and about 4% seemed to fix it. Just not sure if the Ba will mess with the colors of Mason stains.

I'm really trying to formulate an 04 china painting base. I had some great relatives bring me over a bunch of different Mason stains when they visited from Canada (we can't get Mason stains here either...), I had heard the tech of stains had much improved, so I though I would see if they now worked at ^10 reduction.....Not really....Undaunted, I now want to try making up China Paint-like 04 colours to apply over my ^10 stuff and re-fire in my bisque.