Abbey pH Pen™
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$6.00
Use this pen to make a quick check of the pH of paper by applying a test line. If when dry the line shows yellow, the paper is acidic. If the line show purple, the paper is neutral or alkaline. The pen is based on a chlorophenol red test. Note that coloured papers may affect the test colours.
- Product Code:MS-ABBY
- Availability:22
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