Three-Dimensional Photography - Principles of Stereoscopy

312 THREE-DIMENSIONAL PHOTOGRAPHY

the thiocarbamide toner, and is used as a part of the developer,
not as a subsequent treatment.

SOLUTION A

Metol azgr 2.5 6

Sodium sulfite ‘5 g

Hydroquinone 10 g

Sodium carbonate ‘5 g

Water to make .................. ... 2ooz

SOLUTION B

.......................................

... ............

...................

................

1000 ml.

Ammonium carbonate ........................^2 oz^100 F

Ammonium bromide z oz^100 g

Gold water to make .......................... 2002 1000 ml.

SOLUTION C

.........................

Thiocarbamide .............................. 26 gr 3g

Ammonium bromide ............ 9 P ‘g

Water to make .............................. 2ooz 1000 ml.

Color is controlled by varying the proportion of A, B, and C.

Color

Relative

A B C Exposure

Pure black .................... 7 ?4 ?h 1

Blue black 6 1% %? 2

Blue 51/2 2 % 4

Violet 5 2% %?

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..........................

......................... 8

Finishing.-Glass positives should always be flowed with a good

negative or print lacquer as soon as thoroughly dry. They should

then be further protected by filing in individual envelopes or in

a filing cabinet which is provided with slots or other means for

keeping the slides separated. With the cabinet viewer, the slides

are filed in the viewer “trays.”

Those of you who wish to get into stereo processing seriously

will not find it difficult, although it does demand careful tech-

nique. Carelessness and stereo do not mix. But with reasonable

care there is no great difficulty, and most of the procedure is iden-

tical with that of planar photography.