Finishing properties of polyurethane, nitrocellulose and acid catalyst based coatings on Punah (tetramerista glabra) / Hairulfiza Md Arof

This study evaluates the surface properties of the finished Punah (tetramerista glabra). The idea is to promote Punah as one of the commercial timber in furniture industry. This study is carried out to study the suitability of three types of lacquers i.e. Polyurethane, Acid catalyst and Nitrocelïulose. The specimens were coated with four types of finishing system; (A) Filler, sanding sealer and topcoat (B) sanding sealer and topcoat (C) Filler and topcoat (D) topcoat (3 coats). The coated specimens were assessed for impact, scratch, abrasion, heat, adhesion, gloss, cold check, household liquid, solvent and chemical resistance. From this study, PU lacquer shows a good resistance against impact, scratch, heat, gloss, cold check, household, solvent and chemical but less for adhesion test. AC has good resistance against all type of test except for gloss. NC gives better gloss compared to AC lacquer. System C (Filler and topcoat) shows a good finishing performance as compared to system A, BandD.