BS EN ISO 8975:1995 Plastics. Phenolic resins. Determination of pH
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This International Standard specifies a method for the determination of the pH of liquid phenolic resins at the manufacturing stage or on the market.
NOTE 1 A variant of this method, applicable to solid phenolic resins, is described in annex A. With liquid resins having a viscosity greater than 2 Pa-s, it may be necessary to use this variant, which calls for a magnetic stirrer.