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ORWO COLOR Positive Film PC 7

Size: 70 mm, 25 mm, 32 mm, 16 mm. Identification: No. 448 for 70 mm and 35 mm films.

No. 449 for films of 32 mm, 16 mm. On the side of the film and next to the perforation there is a latent image printed that reads as follows

After demonstrations, Orwo Sicherheit Film, Orwo Safety, or Orwo S. This film can be obtained wrapped on a plastic Gore core with a diameter of 50 mm, and the sensitive surface is wrapped inside. General Characteristics: This film is a multi-layered film.

It is used to prepare release prints from low-contrast negatives, with or without a mask. Its color balance was designed so that color correction of the final images during printing does not require anything other than a low-density printing spray when using negatives that bear an internal mask, whether the correction was done by deletion or by addition. This film consists of three sensitive layers, the upper one sensitive to blue rays, the middle one to green rays, and the lower one to red rays. In order to facilitate the prevention of blue rays from reaching both the middle and lower layers, therefore, the upper layer carries a yellow filter inside it (Fig. 58, colored bottom p. 205). There is a green anti-halation layer at the bottom of the film support, which disappears during the process of showing blemishes.

Lighting the dark room: A light filter with a 15-watt lamp behind it is suitable, provided that its distance is not less than the film. If we want indirect lighting in the dark room, it is recommended to use a sodium vapor lamp with Orfo filter No. 165, which is designed for safety light in the darkened room. Al-Aman, Orpho No. 166-, and it is placed. by 100 cm.