TT-P-645 Paint, Alkyd Type, Formula Number 84This specification covers an anticorrosive paint for general purpose applications to steel and aluminum. The paint contains a maximum of 250 grams of volatile organic compounds VOC per liter 2.08 pounds of VOC per gallon. This paint is to be used as supplied with no thinning.

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TT-P-645C

TABLE II. Alkyd resin requirements.

Characteristics	Requirements
Characteristics	Minimum	Maximum
Nonvolatile resin, %WT of solution	49	71
Phthalic anhydride, %WT of non-volatile vehicle	30	-----
Drying oil acids, %WT of non-volatile vehicle	45	55
Acid number	5	12
Dihydric alcohol, %WT of non-volatile resin	-----	7
Viscosity in krebs units at 25 °C	71	125
Color, gardener	-----	10
Weight per gallon, kilograms/liter (pounds/gallon)	0.96 (8.0)	1.27 (10.5)
Soya oil	Positive
Rosin	Negative
Phenolic resin	Negative

3.2 Manufacturing. The component raw materials shall be mixed, ground, and blended as required to produce a product that is uniform and free from grit, lumps, skins, and floating pigment. The paint shall be entirely suitable for the purpose intended and shall be in full conformance to the requirements of this specification.

3.2.1 Toxicity. When evaluated in accordance with 4.7 [the Health Hazard Assessment (HHA)], the paint shall have no adverse effect on the health of personnel when used for its intended purpose (see 4.7 and 6.7). The paint shall not contain more than 0.005 percent cobalt compounds by weight in its formulation, unless a cobalt drier is used (see table V).

3.3 Quantitative requirements. The paint shall conform to the quantitative requirements shown in table III and as herein specified.

TABLE III. Formula no. 84 quantitative requirements.

Characteristics	Requirements
Characteristics	Minimum	Maximum
Pigment, %WT of paint	50	54.0
Volatiles, %WT of paint	21.3	25.3
Nonvolatile vehicle, %WT of paint (calculated by difference)	20.7	28.7
Water, %WT of paint	------	0.5
Coarse particles and skins (as residue on n. 325 sieve) %WT of paint	------	0.2
Viscosity, krebs units	75	105
Weight per gallon, kilograms/liter (pounds/gallon)	1.20 (10)	1.44 (12)
60° specular gloss	7	25
Contrast ratio	0.92	-----
Time to dry to touch (hours)	-----	2.0
Time to dry through (hours)	-----	6.0
Fineness of grind, hegman units	5	------
Flashpoint, °C (°F)	38 (100)	------
Sag resistance, millimeter (mils)	0.15 (6)	-----
VoC, grams/liter (pounds/gallon)	------	250 (2.08)
Asbestos content, %WT of dry film	------	0.5
Crystalline silica content, %WT of dry film	------	0.5