www.rollei.com have neither too much information. If you follow the links you reach :http://www.macodirect.de/analog-colo...3f43c9b61a1865
There are blackbird , nightbird , redbird , crossbird films at the list.
For blackbird below information listed :
Negativ Film black & white
ISO 25/15° / ISO 100/21°
process 100/21° D76 20° stock 10 min
process 25/25° D76 20° stock 6 min
process 100/21° RHS 20° 1+7 10 min
RHS 20° 1+7 6 min
Important handling notes for films with a synthetic film base:
The emulsion is coated onto a transparent synthetic base providing excellent long-term and dimensional stability.
This films has to be loaded in the camera and unloaded in subdued light. Before and after exposition always store the films in the black light-tight film-container. Not following these advices can cause light infiltration through the base material to the exposed pictures. Rollfilms: Please take care in handling the 120 size films in keeping the film-roll tight with two fingers after breaking the unexposed adhesive label to avoid that the film is rolling to "spring off". The same procedure should be followed after taking the roll film out of the camera. The exposed film should be kept compellingly again in the black light-tight rollfilm-container.
From Rollei’s Creative Edition comes the Blackbird 100asa Black and White film. A new stock of great contrast, deep midtones and rich blacks. 36 exposures, process with Black and White chemicals
An picture from the film :