Crayon Test Ph
Par un écrivain mystérieux
Description
Crayon Test pour déterminer le pH d'un papier ou d'un carton
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Basic Info: Material created and made in USA. Lineco is a leading and trusted brand for archival and high quality art, photography, and framing
Lineco pH Testing Pen for Paper or Paperboard Products.
The chlorophenol red indicator solution in the pen will turn purple on any paper with a pH of 6.8 and above.
Lineco pH Testing Pen - ideal for crafts for checking acidity in paper and card
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The Hydrion Mechanical pH Pencil measures the pH of any surface to the nearest full pH value The Hydrion pH pencil can be used to test irregular or
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