The history of three-color photography (1925)
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280 History of Three-Color Photography
G. Millochau, Compt. rend. 1907; Brit. J. Phot. 1907, 54, 364 soaked plates for 10 minutes in distilled water, slightly acidulated with acetic acid, then immersed them in a saturated alcoholic solution of malachite green, rinsed, dried and found the sensitiveness extended to 9500. T. T. Baker, Brit. J. Phot. 1904, 51, 867, 1066, 289; Brit. J. Almanac, 1906, 767 repeated Miethe's experiments with glycin red and cyanin and Valenta's with wool black, aurantia, thiazol yellow, uranin and auracin. In Phot. J. 1907, 47, 207; Brit. J. Phot. 1907, 54, 245; Phot. Coul. 1907, 2, 13 ; abst. Jahrbuch, 1907, 21, 403 Baker detailed trials with diazo black BHN and benzo green in conjunction with silver nitrate and said they sensitized to about 9800. These were first tested by Valenta.
62. Liesegang's Phot. Almanach. 1905, 59; abst. Brit. J. Phot. 1905, 52, 89; Brit. J. Almanac, 1906, 769.
63. Phot. J. 1920, 60, 183; abst. J. S. C. I. 1920, 39, 369R, 468A; Annual Repts. 1920, 4, 511. Cf. J. W. Pope, Manchester Lit. Phil. Soc. 1919, 64, (2), 28; abst. Nature, 1919, 104, 346.
E. Konig, Phot. Korr. 1920, 57, 312, commenting on above stated that pinachrom contained two ethoxy groups.
64. Chem. News, 1856, II, 219; 1859, I, 15.
65. Proc. Roy. Soc. 1863, 12, 410; Jahresber. 1862, 351. Cf. Nadler and Merz, ibid. 1867, 512.
66. Rec. trav. Chim. 1863, 2, 28, 41.
67. Ber. 1883, 16, 1847.
68. Phot. J. 1920, 60, 253; abst. J. S. C. I. 1920, 39, 802A; Annual Repts. 1920, 4, 511; Sci. Tech. Ind. Phot. 1921, 1, 6; 1922, 2, 86.
69. "Die Dreifarbenphotographie nach der Natur," Halle, 1904; Chem. Ind. 1903; Jahrbuch, 1903, 16, 437; Phot. Korr. 1903, 40, 173. Cf. G. E. Brown, Brit. J. Phot. 1902, 49, 281, 1002; 1903, 50, 203; 1904, 51, 489; Sci. Amer. 1903, 828. C. Kaiserling, ibid. 282. E. Konig, Phot. Korr. 1903, 40, 311; Jahrbuch, 1903, 16, 438. On the constitution of ethyl red cf. E. Kaufmann, Chem. Ztg. 1911, 409.
70. Brit. J. Almanac, 1905, 865; Brit. J. Phot. 1904, 51, 489.
71. Jahrbuch, 1905, 19, 334; Brit. J. Phot. 1904, 51, 708.
72. Zeits. wiss. Phot. 1904, 2, 272; Phot. Woch. 1904, 50, 246; Jahrbuch,
1905, 19, 336.
73. Brit. J. Phot. 1905, 52, 391 ; Brit. J. Almanac, 1906, 768.
74. Phot. J. 1905, 45, 264; Brit. T. Phot. 1905, 52, 568; abst. Brit. J. Almanac,
1906, 768. Cf. T. T. Baker, Photography, 1904, 373. J. Ive, Phot. Woch. 1904, 50, 329.
According to E. Konig, "Photochemie," 1906, 329 homocol is a mixture of isoquinolin red with an isocyanin, and this is readily seen if some acetic acid be added to the solution, as the isocyanin is at once decolorized, leaving the quinolin red.
75. W. Gummelt, Jahrbuch, 1911, 25, 368.
Rost, Franz and Heise, Fortschritte Gebiete Rontgentechnik, 1910 had obtained the absorption spectra of blood with such plates.
76. Phot. J. 1903, 43, 262.
77. Maker's instructions. Cf. Brit. J. Phot. 1903, 50, 694. A. Callier, Bull. Belg. 1904, 42; abst. Jahrbuch, 1903, 16, 438. A. J. Newton, Photogram, 1903, 10, 302; abst. Jahrbuch, 1904, 18, 386. E. Valenta, Phot. Korr. 1903, 40, 359.
The same method was advised for pinachrom and the ratio of exposures with orthochrom with Konig' s subtractive filters, was 1 :3 :6 for the blue, green and red respectively. With pinachrom it was 1 '.2l/2 :2r/>. Cf. Photography, 1903. 40, 310, 366, 479; '1904, 41, 116, 172, 281; Tahrbuch, 1904, 18, 386. W. A. Scoble, Phot. J. 1907, 47, 195; abst. Jahrbuch, 1907, 21, 403.
78. Von Hiibl, Jahrbuch, 1905, 18, 183; Brit. J. Phot. 1906, 53, 147; Phot. Korr. 1906, 43, 157.
79. J. C. S. 1922, 121, 2004; abst. Amer. Phot. 1923, 17, 312; J. S. C. I. 1922, 41, 997A; C. A. 1923, 17, 108.
80. Phot. Korr. 1904, 41, 108, 116; 1905, 42, 406; abst. Brit. J. Almanac, 1906, 770; Jahrbuch, 1906, 20, 410; 1907, 21, 309; Brit. J. Phot. 1904, 51, 306; 1905, 52, 69; Phot. Mitt. 1905, 42, 325. Cf. "Photochemie," 1906, 329. E. Valenta, Phot. Korr. 1906, 53, 132. J. E. Greene, Amer. Annual Phot. 1912, 26, 207.
81. Penrose's Annual, 1901, 15, 129.
82. Bull. Soc. franc. Phot. 1906, 48, 132; abst. Phot. J. 1906, 46, 260. Instructions for using sensitol green and sensitol red, the English made pinaverdol and pinacyanol, marketed by II ford. Ltd. Brit. J. Phot. 1917, 64, Col. Phot. Supp. 11, 7.