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Comment by Norm Stuart on June 30, 2015 at 10:15pm

Since the original greenish-blue Cone 10 reduction iron Celadon is often never exactly what the Cone 10 aficionado is looking for . . .

Mason Stain offers  "6201 Celadon stain" for $12.96 per pound for those who will settle for nothing less than the exact original color iron produces at Cone 10 in reduction.

Although Matt Fiske offers a glaze when combined with 1.75% "Mason Stain 6376 Robin's Egg Blue" presents what he thinks it a true Cone 10 Celadon.  Just bear in mind that 6376 Robin's Egg Blue is a Chrome-Tin stain which needs a specially supporting glaze with the correct amount of Calcium to offset the acidity of Silica.

Fiske Celadon

Fiske 6/10 Clear Base:

F4 (Or MinSpar) Feldspar 34.9

Whiting 12.8

Zinc Oxide 11

OM4 Ball Clay 13.8

Silica 27.5

(Pictured: Add 1.75% Robin’s Egg Blue Mason Stain)

I personally think the closest match in our Insight-Live Glaze Database is this Burke's Strong Celadon.

As I mention in my photo notes, this glaze crazes far less when made with a high Potash Feldspar like G-200 or G-200 HP, than the Soda Feldspar in the original recipe.  There's using more crazing than you can actually in the photos unless you use a high-expansion clay like New Zealand Frost with a COE of  6.99   Laguna WC-437 New Zeland Frost ^6

When our studio first bought this extremely white porcelain porcelain I recall the COE was more like 7.8, so only ZAM Celadon fit the clay at all - and even that crazed.

Zam Celadon and Costello Carbonate on New Zealand Frost

Comment by Donna Kat on June 30, 2015 at 6:46am

Can you give us some information about this glaze?  Beautiful piece and glaze.