Preparation of Detector Paper Containing Orasol Navy Blue 2RB

摘要

Orasol Navy Blue 2RB was selected as a dyestuff to be used in paper for detecting propylene glycol, a possible ingredient of liquids for chemical warfare training. Dyestuff as received from the manufacturer contained a large proportion of particles that were too fine to be used in making paper. These fines were successfully removed by settling or were agglomerated by spray-drying. For propylene glycol detection, the base paper should be prepared without internal sizing but sized papers were also prepared for possible use with other liquids. Paper basis weight was reduced about 20% from the usual weight for Canadian detector papers without any decrease in performance except in wet strength of unsized paper. The effects of glass fiber, titanium dioxide pigment and background color were investigated.