Gelatine chloride printing-out papers (P. O. P.) customarily used a thiocyanate and gold toning formula, rather than use the gold-borax formula.
The Photographers Printing-Out Paper Kit contains requisite chemicals to compound the toning formula recommended by the Chicago Albumen Works for their gelatine chloride P. O. P. The two stock solutions will keep indefinitely.
This kit produces enough toner for about 50 - 8 x 10" prints.
Gelatine chloride printing-out-paper (P. O. P.) are available from the Chicago Albumen Works, P. O. Box 805, Front Street, Housatonic, MA 01236. Phone number: (413) 274-6901.