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glaze test for marcia's (selsor) mat and 3 revsions, cone 6,

updated fri 10 jun 05


Ron Roy on thu 9 jun 05

redux, fired in oxidation.

Hi Alisa - my revision is way off - it is not just the silica - it is not
for this glaze at all.

I have redone Charles's version with frit 3134 however.

EPK - 21.5
Neph Sy - 10.0
Dolomite - 17.5
Silica - 21.5
G200 - 19.0
Whiting - 0.5
Frit 3134 - 10.0
Total - 100.0

Don't assume this is a stable glaze - some of that surface may be due to
underfiring ay cone 6 - best to have it tested for leaching if it's to be
used as a liner glaze with colouring oxides.


>Charles Moore Rev. 2 (Marcia's Mat Chas 2)
>20 EPK
>17.5 Dolomite
>33.5 Neph. Syenite
>30 Silica
>2.5 Whiting
>9 Gerstely Borate
>112,5 gr.
>You've done it Charles!
>This version is a soft white, covering, silk mat glaze. It is my personal
>favorite type of surface, a smooth to touch, milky white, silky, well
>melted, semi mat.
>The glaze is slightly more reflective than both versions above, but still
>mat, with a very smooth feel to the surface. Just makes me want to pass
>the test tile
>across my cheek.
>Good work Charles!
>Ron Roy's Revision (error?)
>15 EPK
>24 Dolomite
>13 Neph. Syenite
>2 Silica
>14 G200 Spar
>15 Frit 3134
>83 gr.
>This is a revision I received long ago from Ron.
>I think I got something wrong in the recipe, because it is so low in
>Silica. It may have been 20 Silica instead of 2.
>This recipe was mat and smooth, but crazed, a sign that the Silica is too low.
>Regards from Alisa in Denmark

Ron Roy
15084 Little Lake Road
Brighton, Ontario
K0K 1H0
Phone: 613-475-9544
Fax: 613-475-3513