A-A-344 Lacquer, Clear Gloss, Exterior, InteriorThis description covers a water-clear, high gloss, air-drying lacquer for application by brush, wiping cloth or roller. The lacquer is intended for general interior and exterior maintenance of primed metal or unfinished sealed wood, or for recoating sanded or solvent activated compatibles finishes.

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A-A-344B

5.0. QUALITY ASSURANCE PROVISIONS

5.1 Certificate of Compliance (COC). In lieu of performance testing under Salient Characteristics, the contractor may provide a COC certifying the offered product(s) meet the requirements of this specification. In case of dispute, over the quality of delivered lacquer product, the requirements and methods described under para. 3.0., Salient characteristics, shall be used. The contractor shall certify that the product conforms to the producers own drawings, specifications, standards, and quality assurance practices, and is the same product offered in the commercial marketplace. The Government reserves the right to require proof of such conformance prior to the first delivery and thereafter as may be otherwise provided for under the provisions of the contract or purchase order.

5.2 ASTM. Use the latest methods in effect on the date of the solicitation or order. In case of cancellation of a method, the Contractor shall obtain a copy and test in accordance with the method revision prescribed herein. ASTM standards and test methods are available from the American Society of Testing Materials, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.

6.0 NOTES.

1. EPA Method 24, is described in 40 CFR (Code of Federal Regulations). Part 60, July 1, 1995, or later method/amendment if superseded.

2. “Dry-to-touch” Test. Prepare a test film in accordance with Note 5 below. The definitions and test methods for “Dry-to-touch” and “Dry-through” shall be in accordance with ASTM D 1640.

3. Adhesion. D 3359. Use method B, cut 6 grid lines.

4. Water & Alcohol Resistance.  By spraying or painting, prepare a 25 um (1.0 mil) dry film of lacquer product on a flat, mill finish aluminum panel which is primed or chemically treated. Cover panel edges completely with test lacquer or alternately seal raw edges with molten paraffin wax before testing. Cure the film at standard conditions, 18-21^oC and 50-55% relative humidity for 48 hours.

Water resistance. Immerse 1/2 of panel in drawn tapwater at standard temperature for 18 hours. “Blot” dry with soft tissue and wait one hour before inspection for spotting and softening; compare against the unsubmerged portion of the lacquer film.

Ethyl alcohol resistance. Repeat the above test. Apply 3 drops of denatured alcohol on the above panel and cover with a watch glass. After 6 hours, dry the area and wait one hour before observation.

5. Self-lifting. Spray a coal of the lacquer onto two thin plate panels prepared in accordance with method 2012 of Federal Test Method Standard 141. At 20^o+/1^oC and 50% +/-5% relative humidity, permit one panel to dry for 4 hours, then apply a second coat of lacquer, onto the first coat. After 15 seconds, 1, 5, and 60 minutes, visually observe the panel for signs of film wrinkling or lifting. Repeat the procedure with a lacquer film permitted to dry for 24 hours. Record and report any signs of wrinkling or lifting.

6. Brushing. At 20-23^oC and 45-60% relative humidity, brush a clean phosphate, flat, 30.5 cm x 30.5 cm (12 x 12 inch), approximately, carbon steel panel with test lacquer using a 38 mm (1-1/2 inch) lacquer brush. The “painter” shall be able to apply one uniform thin coat of lacquer to the entire test panel without experiencing brush “pull” or drag. Sag resistance; raise the panel to a vertical position until “dry-to-touch”; inspect for “sag” or “run”.