The baleens which are found 1 ton per head, but they have few practical use. This study was done to know whether their decomposed products are available for photograhic fog inhibitor.
The baleen was decomposed by sodium hydroxide and sodium thioglycolate solution, and added by formalin. Let it still for a while and adjusted to pH 4.6.
The liquid part was adsorbed on active alumina, and then filtered and desorbed by oxalic acid. Some materials such obtained showed the remarkable power for inhibitor in the photogtaphic emulsion. Varying the method of decomposition and adsorbent, we obtained several sensitizing or even fogging substances.

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In general, so far, the candle has been used widely as a unit of the luminous intensity even in the field of photography. The candle stands upon the basis of the luminous curve. In the photography, if it is not on the spectral sensitivity curve of the photographic material, a considerable error may be produced.
In view of this point, we adopted the photographic candle as the unit of luminous intensity to the materials and made some experiments and calculations of it.
The term, the photographic candle, represents a unit of luminous intensity to the photographic materials.
And the calculation of amount of luminous flux for the materials depends on the values of the relative spectral sensitivities of photosensitive materials.
For calculating the spectral sensitivities of the photographic materials, the blue sensitive, orthochromatic and panchromatic materials were used.
As a result of an experiment with color filters to verify the results obtained by the calculation, a reasonable coincidence was seen between the experimented and the calculated values.

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Photographic effects were experimented on follows:
As general M. Q. developers,
(A) Universal Tri-Chemi Pack (Kodak), (B) Flo Film (Du Pont) As fine grain developers,
(C) Final (Agfa), (D) Atomal (Agfa), (E) Edwal 20 (Edwal Labo.), (F) Minicol (Edwal Labo.), (G) Ansco 17 (Ansco), (H) Microdol (Eastman Kodak)
As developers increacing film speed,
(I) Hydam-additions (Chicago Photo Products), (J) Von-L Gold-XX (Mon Blanc Chem. Co.), (K) Von-L Gold-XX U. S.(Mon Blanc Chem. Co.), (L) Ethol 90 (Associated Agency Corp.)
As fixers,
(M) Universal Tri-Pack Fixer (Kodak), (N) Fixer-Hardner (Ansco), (O) Flo Film Fixer (DuPont), (P) Fixer-one powder (Kodak)
Effects on the characteristic curves, the failure of reciprocity law and graininess of developed image were experimented with referring to D-72, XD-20, Ansco 17M, Fuji FD-122, DK-20 and Fuji “Microfine”. On photographic fixers, some properties required to those were examined.
Noticeable developers were “Microdol” at the point of fine graininess, “Atomal” at linear gradation, Fuji test “FD-S1” at increacing film speed with optimum gradation. Developers of “Final”, “Edwal 20”, “Minicol” and “Ansco 17” were not so fine grains as “Microdol”, “Microfine” or DK-20. “Ethol 90”, “Hydram” and “Von-L Gold-XX” gave extremely hardness tone.
Although Kodak powder fixer was best quality, it was precipitated in water above 30°C as all other mixed powder fixers that were tested.

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