MERKLEYS on sat 5 may 01
Sorry folks, my computer ate the first attempt to send this info. so
here goes. Attempt no.2
The receipts come from c.m. I think , I gleen information from all
over and stick it in a large note book but I rarely include the authors
name thus I have no way to acknowledge the originator, Whom I would like
to thank.
I have tried only the cone 06overglaze and it worked very well on my
base glaze which was a cone 03 gerstley borate glaze.
I used a generic brand sodium silicate, , I would imagine sodium
silicate is sodium silicate, but the recipe calls for n brand.
AS TAKEN FROM C.M.
to weight out sodium silicate use a paper cup as it adheres to glass or
glazes. Use glazes with sodium silicate same day made or sodium silicate
will come out of solution.
The surface sheen and fluid quality of the following glazes are
strongly influenced by firing length as well as the under lying glaze.
To fine tune the over glaze adjust the flux content.
cone 010
N brand sodium silicate 14.
frit 3134ferro 75.7
oma ball clay 10.3
=3D100%
cone 4
gerstley corate 29.4
N brand sodium silicate 8.4
kaolin 13.3
om4 ball clay 17.8
flint 31.1
=3D100%
cone 05
gerstley borate 50.5
N brand sodium silicate 13.8
wollastonite 24.4
om4 ball clay 11.3
=3D100%
cone 06
N brand sodium silicate 49.8
whiting 13.4
om4 ball clay 16.9
flint 19.9
=3D100%
cone 1
N brand sodium silicate 31.6
whiting 16.1
Neph. syenite 40.0
om4 ball clay 12.3
=3D100%
cone 020
gerstley borate 26.3
lithium carbonate 6.9
N brand sodium silicate 63.0
om4 ball clay 3.8
=3D100%
add bentonite 3.0
cone 012
N brand sodium silicate 6.8
frit 3134 ferro 72.5
om4 ball clay 5.0
flint 15.7
=3D100%
add bentonite 3.0
cone 09
gerstley borate 77.8
N brand sodium silicate 11.0
whiting 4.2
om4 7.0
=3D100%
add bentonite 3.0
The following colours are possible in oxidation and red.
Oxidation colours:
enamel white tin oxide 10.0%
opaque turquoise tin oxide 6.0 copper carbonate 5.0
blue green tin oxide 5.0 copper oxide 4.0
bright green chrome oxide 3.0 copper oxide 4.0
pastel green zircopax 6.0 chrome oxide 3.0copper oxide 1.0
chartreuse potassium dichromate 4.0 vanadium pentoxide 5.0
light charteuse zircopax6.0 potassium dichromate4.0 vanadium pentoxide
5.0
tan to brown iron oxide {red} 2.0 to 10.0
browm purple manganese dioxide 1.0 to 3.0
purple at cone 06 or lower-cobalt carb.2.5 manganese dioxide2.0
deep blue cobalt carb 4.0
pastel blue tin oxide5.0 cobalt oxide 0.7
reduction/raku colours
copper luster one-tin ozide 1.0 copper carbonate 2.5 manganese
dioxide0.5
gold luster one-bismuth subnitrate1.0 iron chloride1.0 silver nitrate0.5
gold luster two-bismuth subnitrate1.0 iron chloride 1.0
silver luster -bismuth subnitrate 1.0 copper chloride1.5
turquoise to copper luster-bismuth subnitrate1.0 copper chloride1.5
Hope this is of help to all those interested.
keith
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