The materials key was omitted from the thermoformers' ranking in the Feb. 19 issue. The materials and their corresponding numbers are: 1 polyethylene; 2 ABS; 3 polystyrene; 4 acryclic; 5 polypropylene; 6 PET; 7 ultrahigh molecular weight PE; 8 polycarbonate; 9 other. An item on Page 23 of this issue incorrectly states Chevron Corp. of Houston announced a 4 cent-per-pound price increase for polystyrene. Chevron has not announced any PS price increase at this time.
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