English Translation

Special Annex III to K 15 - 101 - 52. 2-304 IR photography is to be used with success in the following areas: a) reconstruction of charred, smeared and yellowed documents, b) proof of painting overpaintings (forgeries), c) reading of overwritten (over-lubricated) text passages in letters, etc.). d) determination of shaves and etchings, e) differentiation of different printer colours, f) visualisation of powdered mucus (pulse explosions) on dark suit materials, g) visualization of dried skin shots and blood stains on dark suits, h) material differences of all kinds. One uses the long-wave ultra-red radiation, which begins at about 760 mμ and can still be photographed well up to a wavelength of 1050 mμ. Each infrared plate type (the AGFA product is best used) includes a coordinated filter to prevent all other radiations from the plate, except ultra-rot radiation. The AGFA infrared plates are marketed in the following varieties: AGFA-IR plate Hard 700 sensitivity maximum at 710 mμ 1 " 750 11 "1 760 mμ 11 s1 800 1 " 810 m μ " " 1 850 1 855 mμ " 1 " Rapid 700 " 11 710mμ 1 11 1 800 810m μ " 950 11 950 mμ The latter type of plates is only supplied in individual formats to order. (Maintenance at room temperature 2-3 months.) AGFA-IR plate 1050 (sensitivity maximum 1050 mμ is supplied only in individual formats as a special feed. Shelf life at room temperatures 8-14 days. For criminal-technical recordings, the two types AGFA -IR-Hart 800 and Hart 850 are particularly recommended. For all varieties, the less stringent filters (AGFA No. 42, 80, 81 and 82, as well as ruby filters) can be used. For the varieties 750 and 800, the more stringent AGFA-IR filter No. 83, and for the varieties 850 and 950, the strict black filters No. 84, 85 and 87. For artificial light (Nitralight, Nitraphotolight) in conjunction with AGFA black filter Nr. 85 is exposed on AGFA-IR plate "Hart 850" about 300 times as long as on an orthochromatic plate (film) of 18/10 DIN sensitivity without filter. The durability of the AGFA IR plates (with the exception of the grades 950 and 1050) is about half a year. The plates tolerate heat very badly and are therefore to be stored coolly. IR images are best developed in complete darkness in a hard-working developer with undertemperature, to fix for a long time and to water thoroughly. For IR photography, any normal plate device can be used, but the extension of the camera extract by approximately 1/200 of the focal length of the lens is important. (See II/1a.) IR photography also provides excellent services in fog and misty weather, as the fog and haze on the picture are brought to disappearance. For more information see the book: "Infrared photography and its applications" by O. Helwich, 1937. — Verlag Dr. Heering, Harzburg. XIII. Farbenphotographie. For photography in natural colours, the new three-layer (grainless) colour films of AGFA and Kodak are available to us, which were released under the name AGFA COLOR NEU and KODACHROM films for both day and artificial light. The format of this colour film material is 2436 mm, so the films can only be used in the Contax, Leica, Cine-Exacta or any other small film camera. The general sensitivity of the Agfa day light film is 15/10 Din, which of the artificial light film 13/10 Ding and therefore enables momental exposure. However, since the exposure margin for these films is very low, the best way to determine the exposure time is to use photoelectric light meters. Overexposure produces too bright, colourless images, while underexposure, too dark, hard-to-projizable images results. No filter is necessary for AGFA COLOR NEU artificial light film. The colored images of AGFA COLOR NEU and KODACHROM films are transparent (transparent) slides and are therefore primarily suitable for projection in image throwers 5×5 cm, as well as for viewing in the viewing devices specially designed for this purpose, such as "Filmostokieker" and others. For criminal purposes, colour photography is promising in the following cases: (a) to illustrate crime scene photography, whereby reproduction in natural colours gives a better impression and allows a more reliable assessment than black-and-white images, if the colour reproduction is correct; (b) to maintain transient colourings, e.g. to bodies (carbon oxide poisoning) and parts of corpses, broken masses (in case of poisoning), etc. c) to support (for the most part, replacement) the moulding process by reproducing the colours of the object to be formed and recoloured. (e) for the production of slides for distribution in cinematographic theatres (e.g. in the case of a search for colored objects), 11