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                 TG No. 144                                                         August 1987


                 C-6. FEDERAL SPECIFICATION TT-P-636, 25 MARCH 1971, PRIMER COATING, ALKYD,
                 KOOD AND FERROUS METAL.

                     a. This primer Is intended for priming the clean, rust-free, bare or
                 phosphate-treated ferrous metal parts of vehicles, guns, gun mounts, tanks,
                 shipping containers and similar ordnance material. It may also be used as a
                 sealing undercoat on the wooden parts of motor vehicles. It is not intended
                 for use as a lacquer-resistant primer. The color of the primer is
                 characteristic of the red or brown Iron oxide pigments. This primer contains
                 insoluble chromium VI.compounds and the pigment composition is limited by that
                 presented in table C-13.


                 Table C-13
                 Pigment Composition
                                                                               Percent by weight
                 Ingredients                                                   Minimum    Maximum

                     (a)  Iron oxide (FezOs)                                      so

                     (b)  Zinc yellow 




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