Lineco PH Testing Pen - Image 1

Lineco PH Testing Pen

£12.98Save 31%
£8.95
4.1 (14 reviews)

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Acidic or alkaline? Now you can distinguish between what paper or board is suitable for conservation with the stroke of a pen. The solution will turn a shade of purple on paper with a pH of 6.5 or higher. Any other color would indicate a pH lower than 6.5, thereby acidic and unsuitable for artwork that is meant to last.