Difference between revisions of "Archivist's Pen"
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== Description == | == Description == | ||
| − | [Process Materials Corp., NJ] A brand name for a marking pen containing a pH indicator dye. The Archivist's Pen contains [ | + | [Process Materials Corp., NJ] A brand name for a marking pen containing a pH indicator dye. The Archivist's Pen contains [[bromcresol%20green|bromcresol green]] indicator solution. When a small dot of ink is applied to a dampened paper, it will produce a color that is an approximate indication of its acidity or alkalinity. A pH greater than 5.2 gives a blue color while a pH of about 4.5 is green and more acidic levels (pH less than 3.5) are yellow. The dye residue leaves a permanent stain on the paper and should not be used on a work of art. However, it may be useful for matboards, lining paper and hinges (King et al 1970). |
== Additional Information == | == Additional Information == | ||
Revision as of 14:10, 7 January 2014
Description
[Process Materials Corp., NJ] A brand name for a marking pen containing a pH indicator dye. The Archivist's Pen contains Bromcresol green indicator solution. When a small dot of ink is applied to a dampened paper, it will produce a color that is an approximate indication of its acidity or alkalinity. A pH greater than 5.2 gives a blue color while a pH of about 4.5 is green and more acidic levels (pH less than 3.5) are yellow. The dye residue leaves a permanent stain on the paper and should not be used on a work of art. However, it may be useful for matboards, lining paper and hinges (King et al 1970).
Additional Information
° J. Miller & E. McCrady, "Comparison of pH Pens on the Market" Alkaline Paper Advocat Vol. 3, No. 5, Nov. 1990.Link ° A.King, A.Pelikan, W.Falconer, "The Use of the Archivist's Pen and Universal pH Solution for Estimating the Surface pH of Paper" Studies in Conservation, 15:63-64, 1970.
Authority
- Marjorie Shelley, The Care and Handling of Art Objects, The Metropolitan Museum, New York, 1987