It is used by conservators to test manuscripts and documents without damaging them because it is non-bleeding.

It can be purchased through archival and conservation supply stores, such as Conservation Resources or Conservation Supplies Australia . If you'd like, I can: Provide instructions on how to use the test paper

It identifies the presence of iron (II) ions (ferrous ions). These ions are responsible for iron gall ink corrosion , a destructive process that causes ink to eat through paper (oxidative degradation of cellulose).

The test paper is moistened and applied to the ink. If iron (II) ions are present, the test paper changes color (turns a red/purple complex) due to the indicator bathophenanthroline reacting with the iron.

Developed by the Conservation Research Department at the Netherlands Institute for Cultural Heritage (ICN).

Gall-10rar (LIMITED - BLUEPRINT)

It is used by conservators to test manuscripts and documents without damaging them because it is non-bleeding.

Developed by the Conservation Research Department at the Netherlands Institute for Cultural Heritage (ICN).

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