They are resistant to most photographic chemicals, and come in four sizes, each with accurate, easy to read markings. 1200ml, 600ml, 300ml, 150ml and 45ml
Agitation of the processing solutions can be by inversion of the tank using the flexible water tight cap provided, or by rotary agitation using the agitation rod also provided.
In processing 300 ml of solution is required for a single 35mm film or 500ml for two 35mm and one 120 roll film.
It is essential that in use, the auto load reels are always used fixed onto the centre column provided. This ensures that the tank remains light tight during the processing cycle.