Rollei Advanced Technical Ortho Supergraphic ATO 2.1

Rollei Ortho 25 is available on 135 and 120 since  more than 20years! Now coated on a claer 100 micron sythetic filmbase. Also a cutted sheet film coated also on a claer filmbast 175 micron. The gradation is what you are expected from a typicale panchromatic film with compareable sensitive. A little harder when he ist developed with a fine-grain compansation developer. Perfect for developing the Rollei Orth25 is the usage of a developer like the Rollei Low-Contrast (RLC) because of his possibility for tameing the gradation. These sort of films like the Rollei Ortho25 are called in the graphic business as "line-films". Rollei ATO 2.1. is also available since 20 years. Former under the Label: MACO GF. (Genius Film). In the past the ATO 2.1. was only as cutted sheet-film in stock. Since serveral years the ATO 2.1. is also still available as 135 and 120s. As I know in the past there was no offer like that: A true lithfilm sorted for photographs in cartridges and rollfilms. As 135;120s and as cutted sheet film an a clear 100 micron filmbase. The gradation-curve is what you are awaitung from a typical lithfilm but she is much steeper in compansation with the ORTHO 25. "Lith-Film" as people from the graphic business  are calling these type of film. Normaly "lith-films" are in use for reproduction of drawings or writings. Therefore  a Document-developer like the Rollei RHC is suitable. Hig-Contrast_ Dil. 1 and 4 ,  for 5 minutes. If you want to use the Rollei ATO 2.1. for picture-photography it is recommandet to use the Rollei RLC-Developer because he is bending the gradation-curve.

ROLLEI ATO 2.1 (Lith film)
The special thing about this film is, that it can be/should be handled individually with different deveoplers.

With an LOW CONTRAST developer, e.g. our ROLLEI RLC (1+4), or a KODAK TECHNICOL LC, to reach an nearly  image-play, but with higher contrast. That is especially popular with photographers, which aspire dramatic picture results.

With an COMPENSATION DEVELOPER, as our ROLLEI RHS (1+7), or KODAK X-Tol, will achieve a similar effect, but with an tougher gradition.

Normally, however, lith or document, or special lith film developers should be used.
Then you obtain a considerably steeper gradation than, for example, with normal ortho films. From our range, we recommend the ROLLEI RHC (1+4) (high contrast) and/or ROLLEI SUPERLITH (1+4) developer.

In all these developers,  the first attempt should be made with the standard dilution at 20°C, and about 5 minutes development time to start with.
After this time it should be set by their own individual claims to modify.

Negativ sleeves 4x5 inch (10,2x12,7cm):