Where can buy lot from flash paper good price ?
Ebay ?

Thanks

D. Robbins is a wholesaler.

You can try going to your local shop and see if you can order it in bulk through them. They might be waiting to order a couple of items and not meet the minimum order.

When storing a lot of flash paper/cotton/string/powder, be sure to keep it moist, in a sealed bag, and in a metal container.

Ok Thank you for information
I will Try - ON Ebay I see big size 20-50 cm
D. Robbins sell same size ?