I've been using Dektol for paper development for 40 years. I was taught to, and have always used it, straight without dilution. A typical exposure for me is 4-6 seconds at f8. If I dilute at the recommended 1:2, do I adjust my exposure time or do I allow for a longer development time (which is usually around 30-60 seconds). From what I've been reading, the 1:2 working ratio will allow for deeper blacks and contrast. Is this correct?