Underdeveloped Spots On Negatives

[landon_christensen]

<p>I have tried everything I can think of to eliminate underdeveloped spots on my negatives.<br>

They are towards the end, not in the middle of my negatives. I have tried pre-soak, rotary agitation, invert agitation, but nothing I try works. Perhaps someone with more experience could give some pointers???</p>

<p>Thanks,<br>

Landon</p>

[peterbcarter]

<p>Can you scan a sample to show us?</p>

[nealcurrie]

<p>Try using distilled water to mix your developer, and be vigourous while 'tapping' the tank. After getting a couple batches with air bubbles, I started cranking the tank on the counter (much to the chagrin of my wife) between agitations.</p>

[brucecahn]

<p>Agitate continuously in the fixer.</p>

[dpbours]

<p>Make the first wash with distilled water a longer one.</p>

[chris_waller]

<p>Do you rap the tank sharply after pouring in the dev? I pre-soak, giving the tank six inversions, then I rap it hard on the heel of my hand. I then let it stand for 2 minutes, with one inversion after about a minute. Then I pour out the water and pour the dv in.<br>

I mix all my film chemistry using mains water, just filtered to remove particulates.</p>

[vrankin]

<p>Tapping the tank on a hard surface always worked best for me. A side tap on the porcelain sink, after each agitation stopped the bubbles that caused the underdevelopment.</p>