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Acid-Free/Non-Toxic, Photo Safe.
Water Based Ink Ink Colour blue ink is chemically active: Stays
a bright blue when paper is basic, a bright yellow orange tells
you a high acid level is present. An ideal colour is anywhere
close to a greenish tint. Fine point tip.
Good for identifying acid content in
rubber stampable materials as well as memory books albums,
pages. Can also be use to determine the acid content of
stickers, textile products, doilies, stationery and gessoed
canvas. The scale is conveniently printed directly on marker.
2
(acidic)-----------7 (neutral)---------10 (alkaline) |
