Stripes on negative(s)

<p>After processing a roll of Acros in Ilfosol 3, I noticed that some frames (not all) have strage vertical stripes in highlight areas. I don't know what is causing this. The film was in the camera that was moved from inside room temp 70F to outside 15F, but not all negatives show that. Could it be moisture causing it?</p>

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<p>Those only appear on first few negatives, so I shoot for moisture.</p>

<p>They appear more like streaks caused by agitation technique used not being comparable with the reel/tank/ development time.</p>

<p>Just out of interest, what is the camera? Is it vertical or horizontal shutter?</p>

<p>Its a Rollei TLR. I agitated three times every minute 1/4 turn for every flip of the tank. The tank is Patterson plastic reel. These stripes don't show up through the whole roll, but rather on 3-6 shots.</p>

<p>I'd agree with Charles - looks like surge marks from agitation. Plastic reels by Paterson and other manufacturers have squarish spirals, reel guides and flanges that can produce more turbulence with inversion agitation. Surge marks and bubble/"air bell" marks seem more common from negatives developed in plastic tanks/reels, possibly due to excessively vigorous agitation. Try a more gentle rolling inversion agitation.</p>

<p>If it was shot with a Rollei TLR, I'd think the film would be "on-its-side" when spooled on the reel, relative to the orientation of the negatives on the film roll. Wouldn't agitation streaks from the spirals then appear across the negative rather than up and down in the image?<br>

Did you spool the film onto the reel front end first or back end first? That is, would the first 3 to 6 negatives with this effect have been spooled in the middle of the reel or towards the outside during development?<br>

Do the streaks seem to continue from one negative to the next in the affected frames?</p>

<p>I spooled the film back side 12th frame in first. The streaks only appear on some frames and do not continue onto the "breaks" between the frames. They do seem consistent between 3-6th frame counting from start. I thought it could be condensation caused by removing camera from warm car to cold outdoors.</p>

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<p>Its a Rollei TLR. I agitated three times every minute 1/4 turn for every flip of the tank. The tank is Patterson plastic reel. These stripes don't show up through the whole roll, but rather on 3-6 shots.</p>

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<p>The frames it shows up on is relevant to the film position with respect to the reel support arms. They are from the developer flow across the film from either the inversion or the rotation.<br>

Rotation in the same direction each time will cause streaks in any tank/reel system. Alternate the rotation, turn to the right one cycle, to the left the next so that the film has been turned an equal number of times in each direction at the end of the development cycle. 1 turn more in one direction will not have an adverse affect.<br>

Increasing the rotation to 1 to 2 turns per inversion cycle will not affect development time significantly.</p>

<p>Thank you Charles, I will alternate my rotations.</p>