Description
An easy, convenient way to distinguish between safe alkaline paper and board, and unsafe acidic paper and board. The chlorophenol red indicator solution turns a definite purple color on any paper with a pH of 6.5 or higher.
An easy, convenient way to distinguish between safe alkaline paper and board, and unsafe acidic paper and board. The chlorophenol red indicator solution turns a definite purple color on any paper with a pH of 6.5 or higher.