pH Testing Pen

A quick and easy way to test the acidity of paper. Simply draw a line and observe the colour as it dries.

  • Purple/lavender indicates acid-free or neutral pH paper.

  • Yellow or colourless indicates acidic paper.

The pen uses chlorophenol red as an indicator, providing a clear visual result in seconds.

(5070625323)

SKU 5070625323
Brand Lineco

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