sprocket

Hey everyone, I recently felt a bit neglectful of my K1000 since I have been shooting and experimenting with my digital set up. I threw a bunch of rolls of film into my bag and headed off to the mountains for day of hiking with it. After about 4 photo's I went to advance the film but it made...

Hi all! I got some film of mine developed at a lab and I've been seeing these weird shadow-y marks around the sprockets. the lab uses Fuji chemistry and I shoot both Kodak and Fuji, weirdly enough I only see it on Kodak film. Let me know if you have any ideas of what it could be!