Investigation on the Scratch Strength of Clear Paints Used in Furniture Industries on the Wood Species Beech, Elm, Alder and Spruce
2014
Mohammad Ghofrani | Gholamhossein Manavi | Ahmad Mirshokrai
In This research, the scratch strength (Cross-Cut Test) of clear paints (nitrocellulose lacquers and acid catalyst lacquers) of wood species Beech, Elm, Alder and spruce were studied as a function of moisture content (MC) of the samples. For this purpose, lumbers (550×110×12 mm) were cut from sapwood in tangential surfaces and were air dried for one month according to wood drying procedures. Then, for pre-conditioning of moisture content, at the levels of 8%, 12% and 15%, the samples were placed in three clima rooms. Then, finish applied and strength tests were performed. The results revealed that for acid catalyst lacquers the highest scratch strength (10.4%) belongs to Elm wood with 8% moisture content, and the lowest scratch strength (53.6%) belongs to Spruce wood with nitrocellulose lacquers having 15% moisture content.
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