Marvy - Neutral 7 - Acidic Identifier Pen
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.