John Britt on mon 17 may 99
Lesley,
I have also noticed that Malcom's too thick will crawl. I assume you
mean the shino is crawling? (Shivering is chipping off the pot. I doubt
is it is doing that? ) You can correct this by using about half the
calcined clay.
These recipes are quite variable. For example the Malcom's #3
(excluding the 16% soda ash) is approximately 60 Feldspar and 40 clay.
That is then split up between the Neph. Sy. and the F-4 Feldspars, and
the clay is a mix of 0M-4, EPK and Redart. Of course none of those
numbers are firm and you could substitute Ranger Red, Barnard, Alberta
etc. for the Redart. You could use the same percentage or increase or
lower it for more or less color. The same for the Feldspars, you could
use Minspar, NC-4, etc. And the same for the other clays. You could
use xx Saggar, Grolleg, etc.
Be sure to heavily reduce to get black. Good luck ,
Lesley Alexander wrote:
Subject: Glazes for Brown & Red Clays, Shino
----------------------------Original message----------------------------
To Joyce in the Mohave with the quail and her love of rugged
clays,
what
about Shino for those darker clays? Sometimes one can get a shiny
covering
that looks like caramel. Sometimes, on the other hand, it shivers (is
that
a 'desirable' orange peel effect?) I recently used a Malcolm Davis #3
^10
glaze:
Nepheline Syenite 38.64
Soda Ash 16.32
OM-4 Ball Clay 13.01
EPK 17.02
Kona F-4 Feldspar 9.31
RedArt Clay 5.71
Totals: 100.00 %
This was gorgeous on B-Mix, creamy to bright orange brown, with
a
design
drawn in red iron oxide a clearly shown, shiny metallic. On a dark red
roughly finished clay it needed to be extra thick, I think; the matt
brown
didn't appeal to me. On a medium clay (Rod's Bod) it was shiny orange
brown
where thick and well reduced. A less reduced item was a shivery grey,
too
rough for a pitcher. Some other bright brown items also shivered.
One could use the above recipe with all ball clay and skip the
iron-bearing RedArt, for a less brown effect on dark clay.
What does anybody think? I'm pretty new at using Shinos. What if
you want
it smooth and shiny and not shivery?
--
Thanks,
John Britt claydude@unicomp.net
Dys-Functional Pottery
Dallas, Texas
http://www.dysfunctionalpottery.com/claydude
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