Alisa Clausen on sun 29 jun 03
Behrens Black mix is
3.1 Cobalt oxide
0.7 Chrome ox.
3.7 RIO
1.2 Manganese Diox.
1.3 Nickel ox.
lots of hazardous stuff, but nice and black. Like Snail says, I hardly mix
these tiny percents. I make it more or less by the teaspoon full as follows
down the list
3, 1/2, 4, 1 and 1.
regards from Alisa
----- Original Message -----
From: "Snail Scott"
To:
Sent: Sunday, June 29, 2003 4:43 PM
Subject: Re: Waxing Brown Glaze Recipe
> At 10:41 AM 6/28/03 EDT, you wrote:
> >-can anyone tell me which oxide is the black?
>
>
> You usually get a better black with a mixture of oxides.
> Iron is cheap, so use some of that, but add a lot of
> chrome, maybe some manganese, and spike it with a bit of
> cobalt. Without the cobalt, you tend to get brownish
> blacks. The exact proportion isn't critical, but Chappell
> gives a few recipes:
>
> 64 Chrome oxide
> 36 Red Iron Oxide
>
> OR
>
> 54 Chrome Oxide
> 26 Red Iron Oxide
> 15 Manganese Dioxide
> 5 Cobalt Oxide
>
> That first recipe will almost certainly be a bit brown,
> but easy and inexpensive. The second is likely to be
> a truer black.
>
> -Snail
>
>
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