iron oxide red

Item No. 417 D.25
In glazes: The most commonly used oxide in ceramics, both as a flux and as a colouring agent. Sets the melting point down. Colors honey yellow to dark brown with additives of 1-8%. In alkaline glazes red to violet, in reduction firings grey-green-blueish (seladon). An alkaline, supersaturated iron
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can of 250g
Price
CHF 8.30
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Description
In glazes: The most commonly used oxide in ceramics, both as a flux and as a colouring agent. Sets the melting point down. Colors honey yellow to dark brown with additives of 1-8%. In alkaline glazes red to violet, in reduction firings grey-green-blueish (seladon). An alkaline, supersaturated iron glaze forms crystals (aventurine).
In bulk: Iron influences the burning colour of the body. It is reddish-brown and, when finely distributed, colours the mass in this colour. With lime content the colour changes to yellow. Is present in all yellow-brown-red burning masses.
In engobes: Additions of 5-10% iron oxide to white engobe result in reddish-brown engobe.
Chemische Angaben
Keramische Formel: Fe203
Molekulargewicht: 160
Schmelzbereich: 1565°C

Analyse
Fe2O3 + FeO:  98,5-99,00 %
SiO2:  0,30 %
Al2O3:  0,07 %
CrO3:  0,30 %
Chloride: 0,47 %
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