配方类型:

METALS AND THEIR TREATMENT

配方说明:

Blackening Stainless Steel (Japanese Patent 3355 (1957))

配方组成:

Sod. Hydroxide (50% Solution)/1 l.
Sodium Sulfide/55 g.
Nickel Chloride/30 g.

配制方法:

Immerse object in above and heat at 130'C. for 2 to 5 hours.