I've recently started developing my own colour film with the Tetenal C-41 kit. After scanning with my Epson V600 I've noticed that some of my frames have these blocky marks on them (see a few that I've circled in red below).

I've developed two rolls so far, one at 30°C and this one at 38°C, but some frames from both rolls have these blemishes on them.

Are these simply small water spots, or some kind of problem in my developing or scanning process?

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    \$\begingroup\$ These look like some kind of scanning artifact to me. They definitely don't look like water spots. Just to be sure, have you examined the negatives with a loupe? \$\endgroup\$
    – Kahovius
    Commented Apr 29, 2020 at 12:42
  • \$\begingroup\$ @Kahovius Good point. I’ll need to invest in a loupe to double check, but I’ll try re-scanning first. Perhaps it’s Epson’s dust removal feature that’s introducing these artifacts. \$\endgroup\$ Commented Apr 30, 2020 at 18:05


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