Ron Roy on sun 29 oct 06
Hi Beth,
I think you want a cone 10 glaze - both below are cone 6 - I can adjust for
cone 10 if you want.
RR
> Thanks so much Alisa for the receipe for Noxema Blue glaze, and that is
>the name of it,huh? LOL Now to get the nerve up to try this! :)
> Warm regards,
> Beth in the chilly but colorful foothills of Blue Ridge Mtns of VA - USA
>
>-----Original Message-----
>From: alisa@CLAUSEN.MAIL.DK
>To: CLAYART@LSV.CERAMICS.ORG
>Sent: Mon, 23 Oct 2006 2:47 PM
>Subject: Re: The archives
>
>
>On Sun, 22 Oct 2006 23:11:55 -0400, Beth Spindler wrote:
>
>>Hi Ron,
>>Years back a potter at a craft show in Northern Virginia had mugs, etc in
>a beautiful blue glaze - told me that it was your receipe - something like
>a noxema blue ( the facial cleanser jar color) - is this cobalt blue and
>would you be so kind as to share the receipe?
>>Thanks!
>>Beth in BRMTNS of VA
>>
>
>
>
>
>Dear Beth,
>This is a glaze called Noxema Blue, from the archives. It adds up to 66.l7
>gr. and I have not idea about it.
>
>
>NOXEMA BLUE Cone 4-6
>
>Custer Feldspar 38.1
>Dolomite 10.0
>EPK 9.6
>Silica 9.5
>Gerstley Borate 9.5
>
>ADD
>Zinc Oxide 9.4
>Cobalt Carb 3.5
>
>
>
>However, this type of blue, sometimes called Medicine Chest Blue (as were
>many of the bottles that color at a time prior to more plastic like now,
>is easily achieved at cone 6, by using a clear base and coloring it with
>Cobalt or Cobalt and an opacifier like Zinc.
>
>For example, a 20 x 5 base,
>20 Frit 3134
>20 EPK
>20 Silica
>20 Custer
>20 Wollastonite
>
>ADD
>10 Zinc
>3 Cobalt Carb.
>
>will yield a dark, shiny, semi-transluscent blue.
>
>My next idea for testing is take 20 x 5 recipes and trade the EPK and Ball
>Clays in them, and test them with different fluxes. In the few tests I
>have, the difference of the flux used and the amount of iron in the Ball
>Clay, or lack of it in EPK, yields very different color responses.
>
>I think your search for this dark blue will be easily found with a few
>tests of coloring your usual clear glossy glaze. Try Tin and Zircopax, in
>combination of Cobalt as well. Different opacifiers yield different
>grades of clarity and brightness in the blue color.
>
>Best regards from Alisa in Denmark
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
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