Type I Chromic Acid (not offered)

Type II Sulfuric Acid

Class 1 non-dyed

Class 2 dyed color to be specified

Type III Hard Coat

Class 1 non-dyed

Class 2 dyed color to be specified

Class 1 for maximum protection against corrosion

Class 2 when low electrical resistance is required

Chemical Black for copper alloys

Class 1 Alkaline Oxidizing Process for Steel

Class 4 Alkaline Oxidizing Process for Stainless Steel

Type I Without supplementary treatment (clear)

Type II With supplementary treatment

Type III With supplementary phosphate treatment

Type I 99.7 percent gold hardness & thickness to be specified

Type II 99.0 percent gold hardness & thickness to be specified

Type III 99.9 percent gold hardness & thickness to be specified

NICKEL (QQ-N-290)

Decorative, bright or dull finish

Class 1 as coated no subsequent heat treatment

Class 2 metal not affected by heating

Class 3 aluminum alloys beryllium alloys non heat treatable

Class 4 aluminum alloys heat treatable

Type II, Type VI, Type VII, Type VIII

TT-C-490 Zinc Phosphate Type I

TT-C-490 Iron Phosphate Type II or Type IV

DOD-P-16232 Type M Manganese Phosphate

Class 1 Supplementary Preservative Treatement as Specified

Class 2 Supplementary Oil Treatment

Class 3 No Supplementary Oil Treatment

DOD-P-16232 Type Z Zinc Phosphate

Class 1 Supplementary Preservative Treatment as Specified

Class 2 Supplementary Oil Treatment

Class 3 No Supplementary Treatment

Type I Grade A (supplementary treatment) Matte Finish

Grade B Matte Finish

Type II Grade A (supplementary treatment ) Semi Bright Finish

Grade B Semi Bright

Type III Grade A (supplementary treatment) Bright Finish

Grade B Bright Finish

Specifics ASTM B 545 for Type I

Thickness as specified

Type I Without Supplementary Coating (Clear)

Type II With Supplementary Chromate Coating

Type III With Supplementary Phosphate Coating