Lily Krakowski on wed 9 oct 02
I am and remain desperately confused. I clearly missed mail-call the day
this info was sent out. For me majolica remains a lead/tin earthenware
glaze.
And using that term for higher fired lead-free glazes seems to me dangerous
in that, seeing something described AS majolica in a shop, and seeing a
label that says "lead free, microwavee and dishwasher safe" on it some nice
person may think its ok for the Quimper.
However.
MOPE 2
adapted from a Hobart Cowles glaze
Ferro Frit 3134 1/4 c + 1T
Kaolin 1/4 c + 2T
Silica 1T
Tin oxide 1T
DB1
A glaze adapted from a J DeBoos glaze. With added tin it is a wonderfully
pleasing white. It can be used--as I use it--on leatherhard clay.
Dolomite 1/4 c + 1t
Neph. Sy 1/4 c + 1T
Ball Clay 1/2 c
Silica 2 T
C 11
My own. It is almost transparent this way, but opacifies well.
Dolomite 1/4 c
Ferro Frit 3195 1/4 c.
Clay 1/4 c
Silica 1/4 c.
Remember that some of these contain magnesium and two contain boron. None
will have that lovely warm lead glow. It is my belief, but I have not tested
enough that that majolica look can be achieved in many c.6 glazes by
replacing the called-for opacifier with tin.
For those interested in by volume glazes, see my article "Measure for
Measure' Pottery Making Illustrated vol 2 #3 Summer 1999
Lili Krakowski
P.O. Box #1
Constableville, N.Y.
(315) 942-5916/ 397-2389
Be of good courage....
Ron Roy on sun 13 oct 02
Majolica also describes a method of decoration - no need to say anything
else than majolica if you mean a low fire glaze. If you say cone 6 majolica
you mean painting over a white glaze that fires to cone 6.
There is no confusion here - at least to me - I have a complete visual
picture in my head when you use either term.
The real difference is - it is very difficult to make good functional ware
at the lower tempertures - for many reasons including holding the colours
in the ware during use.
While the product can be made to look the same at cone 6 - it is much
easier to make the ware fit for use - clays can be properly vitrified,
glazes will have more silica and alumina so stbility is much easier to
achive - materials are cheaper - off setting increased firing costs. Fit
problems are much easier to address - anyway you all get the picture - just
makes more sense to me from all perspectives.
RR
>I am and remain desperately confused. I clearly missed mail-call the day
>this info was sent out. For me majolica remains a lead/tin earthenware
>glaze.
>
>And using that term for higher fired lead-free glazes seems to me dangerous
>in that, seeing something described AS majolica in a shop, and seeing a
>label that says "lead free, microwavee and dishwasher safe" on it some nice
>person may think its ok for the Quimper.
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Phone: 613-475-9544
Fax: 613-475-3513
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