Adox ATOMAL 49 (formerly known as Calbe A49) is an extra-fine grain, compensating developer which offers both excellent use of film speed and high contrast control.
It especially suited for push processing and can be used with nearly every type of film, whatever the nominal speed. In case of underexposed films, developing times have to be extended to adjust the medium greytones to a normal contrast. The rule of thumb for pushing a film is developing time x 1,33 (1 or 2 stops).
The powder can be mixed to make 5000ml of stock solution. Stock solutions can be kept in a fully filled air-tight container up to to 6 weeks.