Document MGEyDbKa494NdKmJkbLyoMorL

Pratt & Lambert-Inc. Technical Department Bulletin NUMBER : 2666 DATE : SEPTEMBER 25, 1963 SUBTECT: P&L RED LEAD - LEAD CHROMATE PRIMER NO. 30503 FILE: P-R-18 GOODS: G30503 (U.S.& CAN.) Use Quick drying rust inhibitive primer for shop and field use on structural steel. Color Orange Weight- U.S. Gal. 16 lbs. ii oz. Can. Gal. 19 lbs. 8 oz. Consistency Medium brushing Application Brushes easily at package consistency. For spraying, thin each gallon with one pint min eral spirits or Duosol. Clean brushes with mineral spirits or Duosol. Drying Dust free 7 :hours To recoat 16 :hours Gloss Low eggshell Leveling Good Hiding Good Elasticity Good Spreading Rate Remarks U.S. Gal. 750 3q. ft. Can. Gal. 900 sq. ft. P&L Red lead - Lead Chromate Primer No. 30503 was adopted as a standard unlisted item at the Managers' Meeting held September J+-5, 1963. It will be included among other finishes that are recommend ed in the Specification Manual for Sewage Disposal, Water Treat ment and Engineering Projects (now in preparation). P&L Red Lead - Lead Chromate Primer No. 30503 is new in name only. It was developed in 1951 to comply with a utility company speci fication and has since been widely sold as a special under a variety of label names. The primer contains a pigment mixture of 65$ red lead, 19$ lead chromate and 16$ inert. Both red lead and lead chromate have rec ognized rust inhibition qualities, although red lead is better known. The vehicle in the primer is an alkyd. 0007-PTL-000784 NUMBER: 2666 Pratt & Lambert-Inc. Technical Department Bulletin FILE: P-R-18 2 P&L Red Lead - Lead Chromate Primer No. 30503 is essentially a faster drying, better leveling version of Noxide 90 Red Lead Pri mer. The all-oil vehicle of the latter is beneficial in wetting and penetrating rough and corroded metal, but it dries with a soft film. The latter factor is a disadvantage in shop-priming, for the paint is easily scarred during the handling of fabricated steel. P&L Red Lead - Lead Chromate Primer No. 30503 is, therefore, bet ter adapted for shop coating. Quick drying is equally advantageous in field painting. The primer can be recoated with either oil base or alkyd finish coats. P&L Red Lead - Lead Chromate Primer No. 30503 is being recommend ed in the new Specification Manual for Sewage Disposal, Water Treatment and Engineering Projects for use on structural members that are not visible, such as digestor cover truss work and plate work that is not in contact with liquids. Two coats will be specified (without a top coat) in the Manual. At a spreading rate of 750 sa. ft. per U.S. gallon, each coat dries with a film thick ness of 1.0 mil. W. H. LUTZ f 0007-PTL-000785