702. By this process prints may be given a rich sepia tone in from two to five minutes. Bromide prints made for sepia tones by this process should be developed a blue black. They must be thoroughly washed after fixing, in order to eliminate all Hypo, and can be re-developed either after drying or at once after washing.

703. Permanency

Permanency. The re-developing process gives a result which is chemically identical with that obtained by the hypo alum toning, and the print suffers no change in detail or gradation.

704. Uniformity

Uniformity. Following the directions given herein insures absolute uniformity, and a print can be toned sepia in less than two minutes.

705. Directions

Directions. Make up the stock solution as follows:

706. No 1. Bleaching Solution. -

Terricyanide of Potassium ....................

5

ozs.

Bromide of Potassium .....................

5

ozs.

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

120

ozs.

Place this solution in a bottle and label it Bleaching Solution. 707. No. 2. Re-Developing Solution. -

Sulphide ( not sulphite ) of Soda........................

5

OZS.

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

60

ozs.

Place this solution in a bottle and label it Re-developing Solution.

708. Prepare the bleaching bath for use as follows:

Stock Solution No. 1 (Bleaching Solution).....

4

ozs.

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

4

ozs.

Aqua Ammonia ....................................

4

drops

709. Preparing re-developer for use:

Stock Solution No. 2 (Re-developing Solution)..............

1

oz.

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

8

OZS.

710. Manipulation

Manipulation. The bleaching bath should be prepared in one tray and the re-developing bath in another. These trays should not be used for any other purpose, and each tray should be labeled. Immerse the print in the bleaching bath, allowing it to remain until only faint traces of the half-tones are visible and the black of the shadows has disappeared entirely. The image at this stage will resemble that of an undeveloped platinum print. This operation should not take longer than one minute. When the print reaches this stage rinse thoroughly in plain cold water; then place in your second tray of re-dcveloping solution, allowing it to remain in this bath until the original detail returns. This will require from 15 to 25 seconds. When all the detail has returned, rinse under the tap for a moment, then place in running water for half an hour. After the prints arc thoroughly washed, remove the surplus water by placing them between blotters; then hang up to dry.

711. Blisters

Blisters. Blisters are apt to occur in re-development, and usually result from the black and white print not being fixed in a fresh hypo bath. Or, if an acid hypo bath was used, glacial acetic acid may have been employed instead of commercial acetic acid. The blistering can usually be avoided by adding 1 oz. of formalin to each 30 ozs. of bleaching solution. A positive preventative will be found by immersing prints, after re-developing, in an acid hardening bath (omitting the hypo), in proportion 1 oz. of hardener to 16 ozs. of water. This will overcome all tendency to blister. (See page 208.)

712. Note

Note. For those who do not wish to prepare their own sepia toning chemicals, they can procure ready prepared Royal Re-developer from any agency of the Eastman Kodak Company. One package, sufficient for re-developing two hundred 8x10 prints, or their equivalent, costs 75 cents. When ordering these chemicals, simply ask for a package of Royal Re-developer.

THE LAST SHEAF tudy No. 12 See Page 357 H. B. CONYERS

THE LAST SHEAF tudy No. 12-See Page 357 H. B. CONYERS.