3x4 film holders for Polaroid pack cameras

thingiverse

This is an updated version of a double sided Polaroid sized film holder which is easier to assemble. A back that fits onto a Polaroid pack film camera is also included.Cut some dark slides out of black vinyl material such as folio covers. Glue some black felt at the entrance to the film holder on each side, then slide the dark slides into the film holder grooves. Push the end piece over the felt end--you may have to tap it a bit since it's a tight fit. Make sure it slides right to the end stop. Avoid pulling the dark slide all the way out. It helps seal out light and may be difficult to put back in. To load, pull the dark slide back and curl the negative and fit it into both sides of the holder. Flatten the negative at the far end of the holder and push it into the end under the groove. Once it stops, the end of the negative near the opening can be lowered into place into the grooves and flattened out. Push the dark slide in. You may want to practice this in daylight before attempting in the dark. To remove the negative, take a knife blade and slip it under the negative near the opening and lift/curl the negative upwards and pull it out.