MERKLEYS on fri 4 may 01
cone020-4 overglazes
=3D20
To weigh out sodium silicate use a paper cup as it adheres to glass and =3D
glazes, use glazes with sodium silicate same day made or sodium silicate =
=3D
will come out of solution.
The surface sheen and fluidity of the following glzes are strongly =3D
influenced by firing length as well as the underlying glace. To fine =3D
tume the overglaze adjust the flux content.
overglaze one cone 010
n brand sodium silicate 14.
frit 3134 ferro 75.7
om4 ball clay 10.3
overglaze two cone4
gerstley borate 29.4
n brand sodium silicate 8.4
kaolin 13.3=3D20
om4 17.8
flint 31.1
overglaze three cone 05
gerstley borate 50.5
n brand sodium silicate13.8
wollastonite 24.4
ball clay 11.3
overglaze four cone06
n brand sodium silicate 49.8
whiting 13.4
om4 ball clay 16.9
flint 19.9
overglaze six cone1
n brand sodium silicate 31.6
whiting 16.1
nepheline syenite 40.0
om4 ball clay 12.3
add bentonite3.0
overglaze seven cone020
gerstley borate 26.3
lithium carbonate 6.9
n brand sodium silicate 63.0
om4 ball clay 3.8
add bentonite 3.0
overglaze eight cone 012
n brand sodium silicate 6.8
frit 3134 72.5=3D20
om4 ball clay 5.0
flint 15.7
add bentonite 3.0
overglaze nine cone 09
gerstley borate 77.8
n brand sodium silicate 11.0
whiting 4.2
om4 ball clay 7.0
add bentonite 3.0
=3D20
Colour variations in ox.or re. are possible with the following =3D
additions.
oxidation colours
enamel white -tin oxide 10.0
turquoise -copper carb.-3.0
opaque turquoise -tin oxide-6.0 copper carb.5.0
blue green -tin oxide-5.0 copper carb.-4.0
bright green- chrome oxide-3.0 copper oxide-2.0
pastel green- zircopax-6.0 chrom oxide-3.0 copperoxide-1.0
chartreuse-potassium dichromate-4.0 vanadium pentoxide-5.0
bright chartreuse-zircopax6.0 potassium dichromate-4.o vanadium =3D
pentoxide-5.0
tan to browm-iron oxide [red] 2.0 to 10.0
brown purple-manganese dioxide-1.0 to 3.0
purple at con 06 or lower -cobalt carbonate-2.5 manganese dioxide-2.0=3D2=
0
pastel blue-tin oide-5.0 cobalt oxide-0.7
reduction raku colour
copper luster-tin oxide-1.0 copper carb-2.5 manganese dioxide-0.5
cold luster- bismouth subnitrate-1.0 iron chloride-1.0 silver =3D
nitrate-0.5
gold luster two-bismouth subnitrate-1.0 iron chloride-1.0
silver luster-bismouth subnitrate 1.0 copper chloride- 1.5
tourquoise to copper luster- bismouth subnitrate-1.0 copper chlorite-1.5
Hope this is of some help to you I think this information came from =3D
ceramics ill.=3D20
I have not tried any of the reciepes so you definitly will want to =3D
test.
good luck and let me know how things turn out.=3D20
keith
=3D20
=3D20
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