Those of you with photograph collections may find this web site of the Image
Permanence Institute a useful tool for helping identify photographic
processes.
http://graphicsatlas.org/?goback=.gde_76812_member_191804823
Iona McCraith
Preservation Consultant
Archives Association of Ontario
Tel: (705) 277-1309 Fax: (705) 277-2091
Email: [log in to unmask]
www.aao-archivists.ca