These are some of the current glazes being used.
I am now employing crystal growing hold temperatures between 1950F (1066C) and 1875F (1024C).

Dick White

Fusion Frit 644 - 25
Fusion Frit 493 - 25
Zinc - 23.5
Silica - 25
Lithium Carb - 1
I like this glaze with 3% black nickel

Snair III rev.

Ferro Frit 3110 - 48
Zinc - 24
Silica - 21
Titanium Diox. - 6
Lithium - 2.5

Fara Mid Fire

3110 - 50
Zinc - 22
Silica - 14
Spodumene - 4
Talc - 5
Titanium - 2 - 6

Fara Shimbo Mid Fire rev

3110 – 55
Zinc – 23
Silica – 12
Spodumene – 4
Talc – 3
Titanium – 5 - 7
I use this over refractory engobes
Adding 3.5 iron ox and/or .2 cobalt

Untitled

3110 – 51
Zinc – 25
Silica – 19
Dolomite – 5
Lithium – 2
I like this with 3% each: cobalt carb,
iron ox, manganese diox

Bill's base

3110 – 28
GF106 (sub Fusion 413) – 25
Zinc – 24
Silica – 13
Titanium – 4
Lithium – 2
I like this with :
Cobalt carb - .75
Manganese Diox – 4

Untitled

644 – 36
Zinc – 22.5
Silica – 22
Gerstley Borate – 1
Lithium – 3
Add: Barium Carb – 10
Or Strontium Carb – 10
I like this with:
Copper carb – 5/Illmenite – 3
Or
Copper carb – 4/Cobalt carb - .25

Fara Shimbo Celistite

3110 – 50
Zinc – 25
Silica – 15
Spodumene – 5
Talc – 4
Titanium – 2
Lithium – 1
Add: copper carb – 3, iron ox - 1

Richard the 3rd

644 – 41
Zinc – 24
Silica – 27
Gerstley Borate – 1
Lithium – 3
Titanium – 6

Some colors are difficult or impossible to achieve with crystalline glazes alone. One method to create these colors is to use a “refractory slip”. A refractory slip contains less than 50% clay and is applied to dry or bisque fired pots. Stains are added to this “slip” to create colored backgrounds, over which crystalline glazes are applied.

Refractory Slip

EPK – 30
Silica – 30
Potash feldspar – 30
Alumina Hydrate – 10
(By Tony Laverick, published in Macro-Crystalline Glazes, The Challenge of Crystals by Peter Ilsley)

Add stains – 5% - 15%
15% Red inclusion stain should be used.

This slip is applied on bisque fired pots.
I get the best results with spray application.
One can brush on, apply a couple coats and sand with 320/400 grit sandpaper after firing.
After application, the slip needs to be fired on the pot to 2100F (1150C)

Glazes with small amounts of added colorants are applied.
Suggested colorants:
Cobalt carbonate - .1 - .25%
Copper carbonate - .25 - .50%
Nickel oxide - .25 - .50%
Iron oxide - .50 – 3%
Titanium – 1 – 3% (will yellow glaze slightly)