Indicator and method for automatic sorting of lumber

Details Indicator and method for automatic sorting of lumber Indicator and method for automatic sorting of lumber

G - Physics

01

N

G01N 33/46 (2006.01) B07C 5/342 (2006.01)

Patent

CA 2348364

A novel indicator and method for automatically sorting fir lumber from other wood species is provided. The indicator consists of a solvent such as ethyl alcohol, a denaturant such as glacial acetic acid, a filler such as water and a pH indicator such as bromophenol blue. The composition turns blue on fir lumber when applied on selected wood surfaces; otherwise it will turn yellow or green. Based on this differentiation, the sorting of the fir lumber can be done automatically using an optical scanning system.

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