Abstract

Earlier attempts of various investigators to increase the sensitivity of photographic emulsions by addition of colloidal silver, silver sulfide, or gold are reviewed. Koslowsky’s discovery of the effect of certain gold complex salts as powerful sensitizers is described and a possible mechanism of the effect discussed. The importance of this effect for the manufacture of modern high speed and fine grain film as well as special x-ray emulsions is indicated.

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  1. S. E. Sheppard, Phot. J. 65, 380 (1925).
  2. W. Jenisch, Zeits. f. wiss. Phot. 24, 248 (1926).
  3. B. H. Carrol and D. Hubbard, J. Research Nat. Bur. of Stand. 1, 565–88 (1928).
  4. H. Weiss, Zeits. f. Physik. Chemie. 54, 3051 (1906).
  5. R. Koslowsky and H. Mueller, Agfa Film Plant, Wolfen, Germany. Reports September-October 1936. Bibliography of Scientific and Industrial Reports (U. S. Department of Commerce, Washington), Vol. 8, p. 873. PB 70053, fr. 831–50.
  6. H. Keller, Ger. P. Appl. 114, 185 (2/17/43). Bibliography of Scientific and Industrial Reports (U. S. Department of Commerce, Washington), Vol. 10, p. 158. PB 84,987 fr. 8366–7.
  7. Waller, Collins, and Dodd, United States Patent 2,399,083 (4/23/46).
  8. T. H. James, et al., P.S.A. J. 14, 349–53 (1948).
  9. F. Dersch and H. Dürr, S.M.P.E. XXVIII, 178–86 (1937).
  10. F. Formstecher, Phot. Ind. 874–5 (1921).
  11. J. M. Eder, Handbuch d. Photographie (1928), Vol. IV, I, pp. 42–63.
  12. O. Erbacher, Zeits. f. Electrochemie 38, 534 (1932).
  13. T. H. James, J. Coll. Science 3, 447 (1948).

Carrol, B. H.

B. H. Carrol and D. Hubbard, J. Research Nat. Bur. of Stand. 1, 565–88 (1928).

Dersch, F.

F. Dersch and H. Dürr, S.M.P.E. XXVIII, 178–86 (1937).

Dürr, H.

F. Dersch and H. Dürr, S.M.P.E. XXVIII, 178–86 (1937).

Eder, J. M.

J. M. Eder, Handbuch d. Photographie (1928), Vol. IV, I, pp. 42–63.

Erbacher, O.

O. Erbacher, Zeits. f. Electrochemie 38, 534 (1932).

Formstecher, F.

F. Formstecher, Phot. Ind. 874–5 (1921).

Hubbard, D.

B. H. Carrol and D. Hubbard, J. Research Nat. Bur. of Stand. 1, 565–88 (1928).

James, T. H.

T. H. James, et al., P.S.A. J. 14, 349–53 (1948).

T. H. James, J. Coll. Science 3, 447 (1948).

Jenisch, W.

W. Jenisch, Zeits. f. wiss. Phot. 24, 248 (1926).

Keller, H.

H. Keller, Ger. P. Appl. 114, 185 (2/17/43). Bibliography of Scientific and Industrial Reports (U. S. Department of Commerce, Washington), Vol. 10, p. 158. PB 84,987 fr. 8366–7.

Koslowsky, R.

R. Koslowsky and H. Mueller, Agfa Film Plant, Wolfen, Germany. Reports September-October 1936. Bibliography of Scientific and Industrial Reports (U. S. Department of Commerce, Washington), Vol. 8, p. 873. PB 70053, fr. 831–50.

Mueller, H.

R. Koslowsky and H. Mueller, Agfa Film Plant, Wolfen, Germany. Reports September-October 1936. Bibliography of Scientific and Industrial Reports (U. S. Department of Commerce, Washington), Vol. 8, p. 873. PB 70053, fr. 831–50.

Sheppard, S. E.

S. E. Sheppard, Phot. J. 65, 380 (1925).

Weiss, H.

H. Weiss, Zeits. f. Physik. Chemie. 54, 3051 (1906).

Other (13)

S. E. Sheppard, Phot. J. 65, 380 (1925).

W. Jenisch, Zeits. f. wiss. Phot. 24, 248 (1926).

B. H. Carrol and D. Hubbard, J. Research Nat. Bur. of Stand. 1, 565–88 (1928).

H. Weiss, Zeits. f. Physik. Chemie. 54, 3051 (1906).

R. Koslowsky and H. Mueller, Agfa Film Plant, Wolfen, Germany. Reports September-October 1936. Bibliography of Scientific and Industrial Reports (U. S. Department of Commerce, Washington), Vol. 8, p. 873. PB 70053, fr. 831–50.

H. Keller, Ger. P. Appl. 114, 185 (2/17/43). Bibliography of Scientific and Industrial Reports (U. S. Department of Commerce, Washington), Vol. 10, p. 158. PB 84,987 fr. 8366–7.

Waller, Collins, and Dodd, United States Patent 2,399,083 (4/23/46).

T. H. James, et al., P.S.A. J. 14, 349–53 (1948).

F. Dersch and H. Dürr, S.M.P.E. XXVIII, 178–86 (1937).

F. Formstecher, Phot. Ind. 874–5 (1921).

J. M. Eder, Handbuch d. Photographie (1928), Vol. IV, I, pp. 42–63.

O. Erbacher, Zeits. f. Electrochemie 38, 534 (1932).

T. H. James, J. Coll. Science 3, 447 (1948).

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