Successful Contact Sheets

Over-developed film = Dense negatives

Notice below how you can't see the numbers....it's all black

Under-developed film = Thin negatives

Notice below how you can see the numbers,

but you can also see all the holes on the edges of the film...

Properly-developed film = Good negatives

Notice below how you can read the numbers clearly, but you can't see the holes on the edges...it's all black

This is how you want your contact sheet to look