The Ilford Microphen Developer is used especially for developing black and white photographs. This developer can make a 1-liter developer powder. It is ideal to use for acquiring high film speed. The power is made to use at the fast end of the exposure range. Thanks to the low alkalinity, the grain size is reduced, and clumping is avoided. You can dilute the developer to 1+1 or 1+3 to use it as fresh solution each time.