Please share with me your favorite clear cone 6 recipes.  I am having trouble with my recipes being cloudy.  Thanks so much.

Bonnie Hornsby

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This is what I use, (I claim no credit), it was shamelessly lifted from the net.

It's a really nice well behaved glaze for me; + 4% Tin Oxide will give you a creamy white.

20 Potash Feldspar
20 Ferro Frit 3134
15 Wollastonite
20 EPK
6 Talc
19 Silica

Thanks so much.  I'll try it out. 

Digitalfire reports, "A down side to boron in certain glazes is that it combines with silica to form borosilicate crystals which can make an transparent glaze go somewhat cloudy." . . . "Al2O3 has a stiffening effect on the melt and helps prevent the crystals from growing. Use INSIGHT to hold or drop the SiO2 while increasing the Al2O3 until the crystals are inhibited."

I like the Glossy Base 1 in "Mastering Cone 6 Glazes" which does not have this problem, using a variety of fluxes with just 4.62% Boron from the Ferro Frit 3134.

Glossy Base Glaze 1
20.0%    Feldspar G-200 Potash
20.0%    Ferro Frit 3134
10.0%    Wollastonite
20.0%    Kaolin - EPK
18.5%    Silica
11.5%    Talc

The MC6 Glossy base recipe needs to be modified if you cannot buy G200 or if you are using Texas Talc.  here are the adjustments - works great for me:

Glossy Base 1:

Custer Feldspar       23.5
Ferro Frit 3134         20.0
Talc                        11.5
Walloastonite          11.0
EPK                       20.0
Silica                      14.0
Total:                    100.0

or using Minspar:

Minspar 200 (soda)         22.5
Ferro Frit 3134               19.5
Talc                              11.5
Walloastonite                11.0
EPK                             18.5
Silica                            17.0
Total:                          100.0

Clear Liner:

Custer Feldspar      24.0  - the mine where Custer comes from has changed over time and doesn't test to what they print
Ferro Fri 3134        20.0
Wallastonite          15.5
EPK                     20.0
Talc                        6.0  - texas talc
Silica                    14.5
Total:                  100.0

or with Minspar:

Minspar 200 (soda)    23.0
Ferro Fri 3134           20.0
Wallastonite             15.5
EPK                         18.5
Talc                            6.0 - Texas Talc
Silica                        17.0
Total:                      100.0

A little late to this topic but I want to share my favorite cone 6 clear glaze recipe, from Ellen Currens.

50/50  Clear

50 gerstly borate

50 plastic vitrox clay

Beautiful clear that takes stains well, as with all transparents apply thinly.  We mix this by the bucket full at the pottery

and find it very dependable.

Gerstley Borate makes a good substitute for man-made frits.

The resulting clear tends toward a warm yellowish tint. The man-made frits make a clear which tends toward a cool blue.

Plastic Vitrox Clay is an interesting product, sort of a kaolin which is actually a fairly low potassium feldspar with a touch of calcium.  We have a 50 pound bag and haven't used it as much as I should.

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