PH Testing Pen

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Lineco’s pH Testing Pen


[Lineco] A trademark for a pen containing a pH indicator dye. Lineco's pH Pen contains chlorophenol red indicator solution. When a small dot of ink is applied to a dampened paper, it will produce a color that is an approximate indication of its acidity or alkalinity. A pH greater than 6.8 gives a violet color while acidic pH levels below 5.2 are yellow. The dye residue leave a permanent stain on the paper and should not be used on a work of art. However, it may be useful for matboards, lining paper and hinges (King et al 1970).

Synonyms and Related Terms

Lineco's pH Testing Pen; pH Prüfstift (Deut.)

Resources and Citations

  • A.King, A.Pelikan, W.Falconer, "The Use of the Archivist's Pen and Universal pH Solution for Estimating the Surface pH of Paper" Studies in Conservation, 15:63-64, 1970.
  • Marjorie Shelley, The Care and Handling of Art Objects, The Metropolitan Museum, New York, 1987