MIL-DTL-3691 Dye Mix, VioletThis specification covers two types of a mixture of two anthraquinone dyes \(CAS #?╞s 81-63-0 \(Blue\) and 82-38-2\(Red\)\); Type I - for solvent based binders and bowl and V type blenders, Type II - for air based fluidized bed type blenders.

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18 - 19 - 20 - 21 - 22 - 23 - 24 - 25

MIL --- DTL --- 3691E

2.4 Order of precedence. In the event of a conflict between the text of this document and the

references cited herein, the text of this document takes precedence. Nothing in this document,

however, supersedes applicable laws and regulations unless a specific exemption has been ob-

tained.

3. REQUIREMENTS

3.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspec-

tion in accordance with 4.2.

3.2 Chemical and physical characteristics. The dye shall conform to the chemical and

physical characteristics of table I. Yellow corn dextrin conforming to MIL --- D --- 3994 can be

used to adjust the bulk density of the dye. Only the minimum amount of dextrin required to

obtain the apparent density shall be used.

TABLE I. Chemical and physical requirements.

Requirement

Test Paragraph

Characteristic

Red dye (Per MIL --- DTL --- 3284), percent by weight

20 +/ --- 2

4.4.1

Blue dye (Per MIL --- DTL --- 3668), percent by weight

80 +/ --- 2

4.4.1

Heavy metal content

4.4.4

Arsenic (As), ppm maximum

Cadmium (Cd), ppm maximum

< 15

Mercury (Hg), ppm maximum

Lead (Pb), ppm maximum

< 20

Chromium (Cr), ppm maximum

< 30

Other Heavy metals, ppm maximum

< 10

Volatile matter, percent by weight, maximum

2.5

4.4.3

Particle size distribution:

4.4.2

Average particle size, microns, maximum

Average particle size, microns, minimum

Particles less than 10 microns, percent maximum

Distribution shape

Single mode

Apparent density, grams per milliliter (dry basis)

0.40 � 0.10

4.4.5

Dextrin content, percent by weight maximum

15.0

4.4.6