Weird lines on glossy side of sheet film...

<p>Can you help me understand what it could be??</p>

<p>Thanks,</p>

<p>MA</p>

<p><img src="https://postimg.org/image/l9ofx1att/" alt="" /></p>

<p>From your photo, it looks like the lines are oriented across the short dimension of the film...which should eliminate the possibility that these scratches were caused by holder loading/unloading. </p>

<p>But we need more info! Do let us know about your processing techniques/equipment. Such as: do you process in rotary processor, or in open trays? If in open trays: Face up or face down? Multiple sheets or single sheets per processing run? What kind of tray design? (ribbed, smooth, etc.). Size of trays? Amount of solution in each tray? Are the trays clean? Do you presoak, and if so, with or without adding a bit of photo-flo? What is your agitation technique? Do you lift successive negatives from the bottom of the pile and place them on top? Side to side, or top to bottom?</p>

<p>Specific variations relating to any one (or sometimes more) of the above questions could potentially result in what you've shown us. But I guess if nothing "wrong" is indicated here, I suppose this could be some type of manufacturing defect or packaging malfunction.</p>

<p>Final question: have you made a largish print from such a negative - to verify that you see the scratches on this print? I'll occasionally get some extremely fine (hardly visible in neg), linear scratches on a negative...almost always along the length of the base (non-emulsion) side, which are likely formed during initial film-holder loading - but I can never see them, even on very large (20x30) prints. </p>

<p>At any rate...do let us know more!</p>

<p>I agree with john, those lines aren't from loading/unloading or dark slide retraction/insertion; those would be oriented lengthwise, not side-to-side. To determine whether it's a manufacturing defect, and not caused by film handling or development, sacrifice an unexposed sheet from the package and inspect it carefully in bright light. If these marks are on sheets of processed film, not unexposed/undeveloped sheets directly from the box, then it's obviously a processing or handling issue.<br>

It also could be some form of film reticulation. Google the term, there are several good articles on the subject, and a couple of old threads here on this site. Film reticulation defects are caused by development solution temperature differences during processing, though I'm not sure if it can affect the backing, or only the emulsion coating. </p>

<p>Did you drop the film any time before processing? Did you let it slide on a surface before processing?<br>

How many sheets of film show this scratching? You show one. Are there more?<br>

Reticulation effects the emulsion. This is scratching and most likely from handing.<br>

As mentioned above, we need more information.</p>