Kodak GBX Developer & Replenisher is a single solution developer concentrate 
recommended for the manual processing of autoradiography films. GBX Developer and 
Replenisher offers simplified chemical mixing and improved chemical stability for 
more consistent images. Maintain active developer levels through the use of proper 
replenishment using GBX Developer and Replenisher. Developer solutions should be 
changed monthly, regardless of amount of use or replenishment to high quality 
autoradiograms. GBX Developer and Replenisher is not suitable for use in automated
processors.