5%-25% Silver nitrate ink,indelible ink for stamp or election pen 1.10% indelible inkdifferent colours of Indelible ink for election voting(with 5-25% of silver nitrate). Indelible ink is used for election voting. 2. The content of silver nitrate is 5-25%.The ink can maimtain on the skin of finger above 72 hours, and also can not be washed off by water, enchoal and bleach.we can offer different colours , such as purple, blue, green, red and so on.we offer indelible ink bottles ,bottle with brush, andindelible ink marker. 3. Our quality management strictly obey the rule of ISO 9001, 2000Version. 4. different colours of Indelible ink for election voting(with 5-25% of silver nitrate). Indelible ink is used for election voting.