Take a look at the picture of plates, bowls, and vases with beer-bottle celadon glaze. We call this crackle celadon glaze "beer-bottle celadon" as it uses powderized glass beer-bottles. The glaze recipe reads:

Color
For glass powder, we ball-milled glass beer bottles and wine bottles. The green crackle glaze is from Heineken beer bottle. The small bottle weighs about 200 g. The blue crackle glaze is from Harvey Bristol sherry bottle, that weighs about 500 g. The gray-tan crackle glaze is from Foster beer bottle that has light brown color. All of them create very attractive crackles with transparent green, blue, and tan color.

Cone Temperature
The firing temperataure dictates the textural finish significantly. Cone 9-10: My default firing temperature is at Cone 9-10 in Gas Kiln. The glazed surface is transparent and crackled

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Close up Bottom

Nikom,
i read your post (Re: Fun with beer bottles, ashes, & clay) w/ great interest. For i have been working (well,trying) on "Beerbottle Celadon" glaze in the last semester. I've been interested in creating some crackle celadon (kanmoku-seiji), and found a recipe in the book "Glaze" by Prof. Onishi. His recipe is : Glass about 40%, Spar about 60%. A great recipe, isn't it? Unlike other glazes in his book, this one is rather precise (grin). Others are listed like, for instance, Spar 20-40%, Silica 15-35%, .....Anyway, this was the starting point.

A few years ago, i tried to get crackle celadon by replacing K-spar with Na-spar as Na-spar has larger expansion coefficient (i tried this earlier on Shino and had some success). Some success, but not crackled enough. (maybe, claybody wasn't right, .....all other wrong reasons.) Anyway, I took a hit-or-miss approach and missed.

So, when I saw Onishi's recipe, i tried this time w/ GLASS, and also w/playground sand, too. Well, with this recipe, the glaze made nice crackles but ran like river. And, just like my Shino test, without clay, it was hard to stir once it settles in the glaze bucket. So clay EPK was added. At present, my recipe goes like, Glass 40; Na-spar 60; EPK 20. Still likes to run.

Yes, it is glossy. Crackles. Very nice crackles. And color. Transparent. And, it inherits the color of beer bottles. With Heineken, the glaze is green; w/ Harvey Bristol Cream-Sherry bottle, it is blue; w/ Foster (and bet Budweiser, too) it is light brown. (I wonder what Remy-Martin will do.) All of them are very nice. All cone 10 high-fired, in reduction firing.

This is not quite Celadon yet (as I would like to achieve). Neither I have tried on porcelain yet. Next step, use plain/pane glass and w/ Fe2O3. Also, play w/ EPK and Spar to change the surface. Have to find a way to influence crackle size/texture. Definitely, one of projects next semester. So, I'm very curious how you do "dulling" the surface.

I enjoyed this Beerbottel Celadon "project". Was fun. Yes, I had to consume beer and wine, dilligently, for the sake of ART. (GRIN). And, all cranky noise from ball-mill while beerbottles were being powderized. Thanks to my fellow students who endured the noise in the studio. But, it was worthwhile. (They agree.)