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Harding Black Glaze Formulas


Additional glaze forumulas will be added to this site as on-going testing is completed to confirm Harding's numeric formulas.


ORANGE-PEEL OXBLOOD GLAZE

cone 10 reduction
%
NC-4 Feldspar
Whiting
Silica
Frit 3110
Zinc Oxide

Add Tin Oxide
Add Copper Carbonate
Add Bentonite
55
6
20
15
4

1
0.8
2






Orange-Peel Oxblood Glaze
OILSPOT COMBINATION GLAZES
cone 10 reduction
Apply Harding Oil Spot Cover Glaze over Harding Oil Spot 1. Thickness of cover glaze will influence character of spotting.

Harding Oil Spot 1 %

Custer Feldspar
Silica
Whiting
Ball Clay

Add Red Iron Oxide






23.6
29.2
18
29.2

13.5

Oil Spot Combination Glaze
Harding Oil Spot Cover %
Custer Feldspar
Silica
Whiting
Kaolin
Barium Carbonate
Zinc Oxide

Add Zircopax
Add Yellow Stain*

* Color may be varied by substituting other stains


45.1
10.5
10.5
17.6
11.8
4.6

15.5
10
Oil Spot Combination Glaze
PALE BLUE CELADON GLAZE
cone 10 reduction
%
Custer Feldspar
Whiting
China Clay
Silica

Add: Red Iron Oxide
Add Bentonite
Add CMC


75
10
5
10

1
2
0.5
Pale Blue Celadon Glaze



GREEN CELADON GLAZE
cone 10 reduction
%
Custer Feldspar
Whiting
China Clay
Silica

Add Red Iron Oxide
27
20
20
33

1.5
Green Celadon Glaze



Harding Black Collection and Archive