Agfa Copex Rapid and Spur Nanospeed Developer
The potential of using microfilm in pictorial photography had been over looked in the industry.
http://www.8x11film.com/spur/engmikrofilm.html
To redress this problem Heribert Schain experimented to produce a new developer to do justice to microfilm and in particular created Spur Nanospeed for use with Agfa Copex Rapid film.
For the Minox user 8x11film, in conjunction with Minox, loads Agfa Copex film in Minox cartridges. The film is supplied with 50ml glass bottles of Spur Nanospeed in sets.
Sample photographs http://www.8x11film.com/spur/engbilder01.html