Use the top of the door frame. No one will ever see it. One layer of an opaque cloth outside and one inside will be way more than enough.
you might go to a fabric place and get a bunch of felt a foot or so larger than your doorframe
close the felt in the top of the door, let it hang down and then bunch it up at the bottom of the door.
my darkroom is in the basement, i don't have a door, but i nailed 2 sheets of thick black cloth at the top
and it falls to the base of the "open door" and is a pile of cloth at the bottom ..
it has worked fine for years ... and even a smidgen of stray light that may leak into the room doesn't really make much of a
difference ... i have light leaks from my 1st floor leaking through the ceiling to the darkroom ... it isn't enough to make
that much of a difference ...
That might work for a window as well, roll it up and put a small piece of Velcro so that it stays in place. At the bottom where it touches the window sill, add a row of drapery weights, allow the material to hang over the sill though. When in use as a darkroom you unroll the blackout curtain. When you are finished roll it back up and Velcro it in place.
Originally Posted by jnanian
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For the bottom of the door, there is available a seal that drops down when the door is closed and raises when it is opened. It was not designed as a light seal, so ask for a weather stripping that fits that description. Mosr hardware stores should have it.
Usually, black paint or tape on the door edge and frame will form a sufficient light trap.
Ditto, but I do it on both sides of the doorway, inside as well as outside the bathroom door.
Originally Posted by Sirius Glass
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Make a drape out of black cloth.
Slide it across the door after it is closed.
You can hand it with a curtain rod or just some string on little hooks either side of the door frame.
Walmart and the fabric stores sell heavy black duck canvas and heavy black felt that will work.
Great idea until you mentioned Walmart. I don't like those folks!
Originally Posted by mwdake
Just hang light tight material over the door, and stuff an old towel if there is a gap between floor and door. I did it this way for years in Japan successfully.
As per my recent thread, I put some weather strip around the door. The stuff that I bought was from a hardware store (bunnings in Australia, like Home Depot in the US). Its a foam product that looks like a 3 strip wiper blade. The biggest drama that I had was that its a little thick and the door wouldn't latch. If the gap is around 3/32nd to 5/32nd(2 to 6mm), you should be OK. It was the quickest and cheapest option I found.
The black foam weather stripping works well in my bathroom darkroom. It is available in various widths and thicknesses and is adhesive backed so installation is easy. For the gap at the the bottom I just stuff a towel in it. No light leaks even when loading or processing film. Most home improvement stores carry it and it's cheap.