1) Appearance: dark blue powder

2) Strength: min. 130% (compared with standard)

3) Ratio between sodium sulphide (50%) and dye: 1:1

4) Dip-dye temperature: 80-85°C

5) Uses: the color begins to be light red when treated with bluestone and sodium

   bichromate. Capable of withstanding washing, perspiration, rubbing and hot

   pressing