Looking after a backdrop
The best way to store painted canvas is to leave it hanging.
Hanging, not folded
When a backdrop hangs, gravity does the work for you. The canvas stays flat, and no folds form that you would have to remove later.
That is the whole care guide in one sentence. If there is room to leave the backdrop on its stand, nothing else is needed.
Getting a rolled canvas flat
If the backdrop has been stored rolled, hang it a couple of days before the shoot. The canvas straightens out on its own in that time, and you do not have to do anything to it.
This is worth putting in the calendar. A backdrop taken straight from the roll onto the stand shows in the photograph.
If you are in a hurry
In a hurry the backdrop can be steamed with an ordinary garment steamer. Steam from the back of the canvas, and lightly. The point is to warm the fabric just enough that it relaxes, not to wet it.
Lightly here really does mean lightly. The painted surface is made to take use, but give it the steam carefully and keep your hand moving.
Moisture
The backdrops take a small amount of moisture, so drizzle outdoors is not a problem. A canvas that has got wet should still be left hanging to dry before it is rolled or packed.
In cold weather the canvas can wrinkle a little, but it settles again on its own once it has time to warm up.
Ask about the backdrops
If something is still open, send me an email. I would rather answer a question than sell you the wrong backdrop.