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Grade S275 steel
Protects and intensifies colours without yellowing
Square section artists' pastels
ground pigments
Cobalt Oxide Black Weight:100g Grade S275 steelThe most powerful colouring oxide. This produces a deep blue or blue black colour in lead and leadless glazes and a vivid blue in alkaline glazes. It gives good colour variations when used in combination with other oxides. 1 1. 5% for a deep blue. To remove oxide mistakes or for making a design, use a pencil eraser. It won't smear like when trying to wash the oxide off. TOXIC. Please read the safety information prior to purchase and use: Safety Data
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