655. Note

Note. In case condensers are being used, the lens must remain on the axis of the condenser and the vertical adjustment obtained by raising and lowering the easel board.

656. Preparing Developer

Preparing Developer.

Metol-Hydroquinon Developer.

Hot water.............

50

ozs.

Metol.................

1/4

oz.

Hydroquinon..............

1

oz.

Sulphite of Soda (Anhydrous).................

3 3/4

ozs.

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

60

grs.

Carbonate of soda...........................

6 1/4

ozs.

Note: Ortol may be substituted for metol, using the same quantity.

Dissolve the chemicals in hot water, and in order given, and let stand to cool, when the solution is ready for use. To develop, take

Stock Solution ................

1

oz.

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

0

ozs.

657. Fixing

Fixing. A plain hypo fixing bath is recommended, prepared fresh each day, as follows:

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

32

ozs.

Hypo .........................................

6

ozs.

Note: For Velox or Nepera Papers use acid Hypo bath. (Sec page 208.)

658. Blisters sometimes appear on bromide paper, but can usually be avoided by using a little common salt in the first wash water, after fixing. A positive preventative will be found by employing the following fixing bath:

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

64

ozs.

Hypo ....................................................

8

ozs.

When dissolved, add Metabisulphite of Potash..........................1/4 oz.

Alum .......................................................

.1/4

oz.

The prints should be thoroughly immersed in this bath, to insure proper hardening of the film.