RERAMIC STUDIO 
79 
Frit : Manganese oxide 
] 
[5 
Calcined umber 
20 
Feldspar in flour 
65 
Black: 
Sand 
30,5 
Drj^ clayey kaolin 
20 
Chalk 
24 
Grand feu blue 
6,5 
Frit as below 
25,5 . 
Frit: Feldspar in flour 
30 
Chroniate of iron 
6 
Chromate of cobalt 
3 
Cobalt oxide 
3 
Yellow: 
Sand 
30,5' 
Dr5' clayey kaolin 
20 
Chalk 
> 
22 
20 
Frit as below 
Frit: Feldspar in flour 
30 
Nitrate of in'anium 
8 
Pink: 
Sand 
30,5' 
FN paste 
47 
Chalk 
24 
Tin pink as below 
7 J 
oxidising 
oxidising 
oxidising 
Tin pink : Tin oxide 100 
Chalk 34 
Bichromate of potash 3,5 
The preparation of this tin pink presents difficulties. It 
should be mixed by pouring the dissolved bichromate over the 
tin oxide and chalk, then the mixture should be stronglj^ 
calcined, and washed until the water is colorless. 
Blue celadon: 
Sand 30,5 j 
Y)ry claj'ey kaolin 20 I very oxidising 
Chalk 24 j on account of 
Frit as below 29,5 j copper. 
Frit: Feldspar in flour 
Copper oxide 
Tin oxide 
Iron oxide 
Grey celadon: 
Sand 
Dry clayej^ kaolin 
Chalk 
Frit as below 
30 
1.5 
2,7 
0,3 
30,5 j 
20,5 1^ ver3' oxidising 
24 f on account of 
38 j copper. 
Frit: Feldspar in flour 30 
Copper oxide 4,9 
Tin oxide 8,2 
Iron oxide 0,9 
All the above glazes have been created for oxidising fire 
and fire between the fall of cone 9 and bending of cone 10. 
Having been prepared for porcelain, they do not give good results 
on gres. 
The followurg series of colored glazes will suit gres, having 
been created at Sevres for the coloration of the large gres 
frieze which adonis the facade of the Grand Palais, on Avenue 
d'Antin. The bodj^ exerting a great influence over the glaze, a 
special palette had to be created for the execution of this frieze. 
The substances which enter into the composition of these 
glazes do not require the slow and troublesome work of fritting, 
as they are simply mixed. All the following formulae belong 
to the manufactory of Sevres, and are of easy execution: 
Colorless glaze for gres : 
Is made by mixing and grinding together in water, the 
following substances, which can be bought from Mess. Plouenc 
Freres, Paris, and which must be as thoroughly pulverised as 
possible : 
Feldspar from the Pyrenees 42,1 
Ouartzy sand of Nemours 27,2 
Dry claj^e3- kaolin of Limoges 13,0 
Chalk from Bougival 17,7 
The Nemours sand is nearly pure silica, and the kaolin 
which enters into ■ this composition is an hydrated silicate of 
alumina. 
Like the other glazes, these gres glazes are applied either 
on raw or baked ware, after having been diluted in water 
thickened with a little gum tragacanth. 
Cobalt blue for gres: 
Cobalt oxide 3,0 
Bougival chalk 14,1 
Feldspar from the Pyrenees 42,1 "oxidising 
Ouartzy sand of Nemours 2^,2 
Dry clayey kaolin of Limoges 13,0 
Manganese violet brown for gres: 
Manganese brown oxide 
5,0 
13,0 
45,0 
28,5 
11,0 
Chalk 
Feldspar 
Quartzy sand 
Dry clayey kaolin 
Nickel reddish brown for gres: 
Carbonate of nickel 3,0 
Chalk 15,3 
Feldspar 42,1 
Quartz3^ sand 27,2 
Drj^ claye^^ kaolin 13,0 
Uranium yellow for gres: 
Uranium oxide from the calcination of 
uranate of ammonia (a very im- 
oxidising 
oxidising 
portent point) 
5,0 
Chalk 
17,7 
Feldspar 
42,1 
Quartzy sand 
29,3 
Dry clayey kaolin 
8,5 
Iron yellow brown for gres: 
Pure red oxide of iron 
5,0 
Chalk 
13,0 
Feldspar 
45.0 
Quartzj^ sand 
28,5 
Dry clayey kaolin 
11,0 
Chrome green for gres: 
Green chrome oxide 
1,0 
Chalk 
17.7 
Feldspar 
42,1 
Ouartzy sand 
28,0 
Drj- clayey kaolin 
11,3 
Copper green for gres: 
Copper oxide 
4,0 
Chalk 
12,7 
Feldspar 
42,1 
Quartzy sand 
27,2 
Dry clayey kaolin 
13,0 
oxidisitig 
oxidising 
oxidising 
oxichsina 
By simple mixture of these fundamental colors, it is easy 
to obtain an unlimited range of tones, and to thin them with 
colorless glaze to bring them to the desired shade. For in- 
stance a flesh tone will be obtained by the mixture of 
Manganese glaze 50 
Colorless |glaze 50 
