Instrument - PH Meter For Use in Woollen Mill, c.1940

Historical information

A complex instrument used to determine the pH factor of liquid samples, in this case, dyes. Without this instrument to measure the pH level of dyes before use, it would be impossible to ensure successful and repeatable results when dyeing wool.

Physical description

pH meter contained within dark wooden box, opened with two brass clasps. Contains dials, an electrode, glass bottle of potassium chloride and instructions for use on card inside lid.

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