developing - What caused these strange patches on developed film negatives? - Photography Stack Exchange

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Strange spots on some film negatives

I keep getting these dots in my negatives and sometimes it erases the whole image but the dot. What is causing this to happen to my negatives when I am developing them?

film - Why are there weird red spots and blobs on images taken with Yashica Super FX-3? - Photography Stack Exchange

Inconsistent defects/black spots on negative, first time developing with these chemicals : r/Darkroom

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Inconsistent defects/black spots on negative, first time developing with these chemicals : r/Darkroom

film - What are these circular splotches on my negatives? - Photography Stack Exchange

developing - What caused these strange patches on developed film negatives? - Photography Stack Exchange

Large undeveloped patches of film?

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