What is what does leave film on tray mean?

"Leave film on tray" usually refers to the instruction given on certain types of photographic film, particularly those used in <a href="https://www.wikiwhat.page/kavramlar/instant%20photography">instant photography</a>, like <a href="https://www.wikiwhat.page/kavramlar/polaroid">Polaroid</a> or some types of <a href="https://www.wikiwhat.page/kavramlar/fuji%20instax">Fuji Instax</a>.

It means:

• Don't immediately remove the film from the camera or processing unit after taking a picture. The film requires a certain amount of time to develop properly.
• The "tray" refers to the slot or ejection point where the film emerges from the camera.
• Removing the film prematurely can disrupt the <a href="https://www.wikiwhat.page/kavramlar/chemical%20process">chemical process</a> and result in a poorly developed or completely ruined image.
• The development time varies depending on the film type and the ambient temperature. Cooler temperatures typically require longer development times. The film manufacturer's instructions will provide guidance on optimal development times.
• Often, the film pack itself contains a dark slide that ejects first when a new film pack is loaded. This should be discarded but is not the photo, which must remain in the tray for development.