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vivk

clear glaze recipe using potash feldspar

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Hi all

I am new to this forum so feeling "newish". Would anyone like to share their recipe for a clear gloss glaze using potash and whiting? I used various percentages of these and had a bit of crazing. Should I add boron - google research suggest this as a solution to crazing. All ideas welcome. Many thanks!

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This is a nice clear glaze reworked by Ron Roy for Susan Hintz

 

Hintz Clear ^6 good w/stains

Cornwall 33.5

G 200 22

Whiting 18

Ger. Borate 10

EPK 5.5

Silica 11

Bent. 2

102.0

 

 

Hi Marcia

Many thanks for your suggestion- however I live in South Africa, so I use locally available clays. I am afraid I don't know what "Cornwall" is. I presume it is a local clay found in Cornwall? Also could you tell me what EPK is?

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Vivk,

That formula looks quite low on alumina with only 5.5% EPK?

 

Here is another simple one that works very well as a clear base for colors at ^6.

Silica 20%, Kaolin 20%, Feldspar 20%, Wollastonite 20%, 3134 20%.

Good luck.

Let us know how you make out.

Regards,

John255

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Vivk,

That formula looks quite low on alumina with only 5.5% EPK?

 

Here is another simple one that works very well as a clear base for colors at ^6.

Silica 20%, Kaolin 20%, Feldspar 20%, Wollastonite 20%, 3134 20%.

Good luck.

Let us know how you make out.

Regards,

John255

 

 

Actually the alumina level is fine in the glaze Marcia posted. It is supplied mostly by the cornwall stone. Min

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