 BetterPhoto Member |
Spots on B&W Film I am getting spots on my film right out of the developing tank. They run the entire length of my film and they look like dark waterspots. There are many of them, and they are small.
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Timothy A. Oppor |
I am by no means an expert but when you are developing it you may be agitating it too much causing air bubbles to get trapped on the film. I like to agitate it 5 seconds for every 30 seconds in the developer. I agitate it for the full 30 sec. in the stop. And agitate it every for 5 sec. every 30 sec in the fixer. Good luck.
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Amy Nieto |
Also, my photography professor taught us to tap the canister three times after you shake it for 5 seconds (or 10 if that's how you do it) Example: You agitate your film for 5 seconds, tap 3 times, then let it rest for 30 seconds. This can also eliminate those air bubbles. Of course, don't tap TOO hard ;)
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William Snyder |
Are you using distilled water in your developing? I agitate 10 seconds every minute during the developing which is about 4 or 5 full shakes. I tap the tank on flat surface after first 10 seconds and after last 10 seconds. I also do a pre rinse in distilled water and a post rinse after the fixer remover for aboout 30 seconds. A good book you might want to try is The Basic Darkroom Book by Tom Grimm.
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Joel |
Hi Cory: As the others have stated the problem is with bubbles forming during agitation. One of the key things to remember when you are developing negatives is always do each step the same each time. This is especially important with agitation. You should agitate the tank for 10 seconds out of every minute. The technique you use for agitation is up to you; it could be a slow total revolution of the tank or a 180 degree slow agitation. Just be sure to always do the same movement for every roll of film. At the end of each agitation period tap the tank on a hard surface once or twice. This will release any bubbles that have formed on the film surface. Hope this helps. Joel
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