Specifications for Photographic/Textile
Conservation Paper
Part One
1. The
paper shall be made from fully bleached alpha cellulose pulp. It shall be free
of lignin, groundwood, particles of metal, waxes, plasticizers, alkaline
buffers, coloring agents, reducible sulfur, oxidizing chemicals, additives and
potentially harmful non-cellulose products. The surface of the paper should be
smooth and free from knots, shives and abrasive particles.
2. pH
range: The paper shall be in the neutral range.
3. Sizing:
Alkaline sizing shall be used in place of alum-rosin sizing.
4. Alkaline
reserve: The paper shall not contain calcium carbonate (CaCO3) or other
alkaline buffers.
5. Sulfur
content: The sulfur content shall be less than .0008% reducible sulfur as ASTMD
984-74 or TAPPI T 406, su 72.
6. Tarnishing
properties: The paper shall be non-tarnishing as per accelerated tarnishing
test ASTMD 2043-69 and TAPPI T 444, T 564. The paper must also pass the silver
tarnish test developed by T. J. Collings and F. J. Young, London, England.
Part Two
This paper meets the same high fold
(minimum 1000 double folds in the weakest direction at 1 kg.) and other strength
requirements as Lig-free , Type 1 in 5 through 10, part two.
Part
Three
Not
applicable since no coloring should be added to this paper.