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Marvy - Neutral 7 - Acidic Identifier Pen

Brand: Marvy

Product Code: 028617197777



Marvy Acidic Identifier Pens. Good for identifying acid content in rubber stampable materials as well as memory book albums.

  • Quickly identify the acid content of paper and textile products
  • When a high acid content is present the pen makes a yellow mark
  • Strong alkaline content is indicated by a blue mark
  • Lime green to dark green marks indicate a surface is acid neutral and safe

Acid-Free/Non-Toxic. Photo Safe.

Water Based Ink, Fine point tip.