Imported from USA
ACU-1 is a maximum acutance, ultra-fine grain film developer, combining optimum quality, with great effective speed.
ACU-1's higher speed ratings permit the use of slower films with superior resolving power and finer grain in situations
that previously required high speed films. ACU-1 is a developer designed for those who prefer to work with a "one-time"
use preparation with convenient dilution ratios.