Green Nickel Oxide used for Enamel, ceramics, glass industries, magnetic materials, thermosensors, stainless steel,etc. Product ... insolubles ≤ 0.04 ≤ 0.04 ≤ 0.50 ≤0.30 Use: Enamel, ceramics, glass industries, magnetic materials, thermosensors, stainless steel, nickel salt ...