FOR the correct and intelligent use of plastics, it is just as important to be able to identify each one as it is in metals to be able to tell aluminium alloys from magnesium alloys or mild steel from high tensile steel, or in timbers to discriminate between birch, spruce and mahogany.
FitzGerald Lee, G. (1949), "The Identification of Plastic Materials: Simple Visual and Nasal Methods for Use by the Non‐Expert", Aircraft Engineering and Aerospace Technology, Vol. 21 No. 10, pp. 331-331. https://doi.org/10.1108/eb031821
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