373. Sepia Paper

Sepia Paper. A sensitizing solution which will give a sepia paper is made according to the following formula:

(a)

Ferric Ammonium Citrate (green).....

no grains

Water....................

1 ounce

(b)

Tartaric Acid..................

18 grains

Water................

1 ounce

(c)

Silver Nitrate...........

45 grains

Water................

1 ounce

(d)

Gelatin...................

30 grains

Water................

1 ounce

374. Solution d should be rendered just fluid in a water bath, a and b added, and lastly c, a few drops at a time. Printing is carried the same depth as for the regular blue print, and the prints then fixed in a solution of hypo- 1 part hypo and 50 parts water. After fixing they should be washed for not less than 20 minutes, then dried.