ciaran_mcmenemy

<p>Normal agitation for black and white using a patersontank (or what I've heard, anyway) is to agitate the tank for the first thirty sec, then one cycle for every 30 sec that passes. The agitation takes the form of rotating the tank while turning it over and back (inversion), and tapping it to dislodge any air that might have settled.<br> What if you chose to agitate it differently? Here are some scenarios:<br> 1) continuous inversions for the whole of the developing times (for this and the rest, assume it is still being tapped to sort out air)<br> 2) continuous agitation for 30 sec every minute <br> 3) faster inversions for the usual process<br> 4) vigorous agitation (shaking it, really rushing it. I know about the sprocket hole issue, at least)<br> if any of you have tried these or know what to expect then please say! I'm thinking that increasing agitation will increase the grain, contrast (more 'punchy') and decrease the development time. but I need some guidelines.</p> <p>-thanks-</p>

<p>It won't let me edit the post, even though I left a little detail out: I did not use the film in one go; I took it out and later put it back, several times, so I could also takes slides and bw photos. I'm assuming that the camera doesn't leak light because I developed a test roll with very recent photos, which turned out fine.</p>

<p>hi, I just started to process my colour films a few days ago. it's going well, but I noticed that one of the films from the last set has got bands on it.<img src="C:\Users\Miss%20C\Pictures\00%20inverts%2000\negscolourdev" alt="" /> The film is HG 1600. I'm not sure if I can upload a photo here, so I will describe it in case. There are blue or dark bands/streaks going fairly regularly in the first 16 frames. The rest of the film is fine, and the other colour film I did at the same time turned out fine.<br> My camera doesn't leak light (it's a Minolta X300s.) and I didn't notice any irregularity when putting the film on the reel in the changing bag. It felt smooth. The HG1600 went on the bottom of the tank and another reel went on top. I developed for 3:45, agitating first ten sec then four times every 30 sec (agitation guidelines aren't clear for C41, they're not even in the Tetenal instruction book!). For blix I decided to try the agitator stick because it's so messy when I invert it - that stuff really manages to leak out!<br> After a good wash I used the stabiliser. (It's a shame I can't wash it after because stabiliser leaves a LOT of marks. I tried using a sponge but I noticed a few scratches after)</p> <p>any ideas why there are streaks?</p> <div></div>