During the late 19th and early 20th centuries, several companies produced pictorial blueprint paper. French Satin Jr. by J.C. Millen was the self-proclaimed first, releasing their photographic paper in 1885. Other notable brands were Eastman’s Ferro-Prussiate Paper and E. & H.T. Anthony and Co.’s Ferroprussiate Paper.
Sensitized paper was highly susceptible to degradation by heat, air and moisture therefore companies distributed it in hermetically sealed metal tubes.
from Graphics Atlas (Identification・Cyanotype・Object View・Support)
ⓒ Graphics Atlas