Ed;(posted 8504 days ago)I use Diafine straight as recommended by the manufacturer. Bill is trying different dilutions to reduce the timing precision needed for the B solution. The A solution development time is at least 3 minutes. When I dump the A solution, I set my gralab to 60 seconds and when the hand hits 45, I pour in the B solution and give five inversions immediately. When the hand hits 0, I dump the B solution and immediately rinse for 10 seconds with water, then immediatly pour in Rapid fix at film strenght. The negatives are just brilliant!