Epson Perfection V500 - Manual (Page 41)

Slide one or two film strips all the way into the film holder with the shiny base side facing
down. Your images and any wording on the film strips should appear backwards on the
side that faces up. You can scan up to 6 standard 35mm images per film strip.
Note:
Hold the edge of the film gently when touching the film; otherwise you may
damage the film.
Make sure the white stickers on the back of the film holder and the areas
around them are not scratched, dusty, or covered in any way. If the areas
are obscured, the scanner may have trouble recognizing your film.
Do not cover any of the small holes in the film holder or the slots on the
sides of the film holder.
Close the cover and press it down until you hear a click. Then press down on all the edges
of the cover to secure it. Make sure the cover is properly seated and closed all the way.