The 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 Sheet (pdf)