Thank you for your help...i will look the Canada balsam... i am curious.
Now i know what sort of enterprise use the pale latex crepe and i phone to one in France. They make bandage for example. I will have an answer on tuesday. I hope they will sell me this famous pale latex crepe.
I cross all the fingers i have .
Last thursday i saw in a microscope that someone lend me the patatoe strach...i understand now, why the Lumière used this. It is so clear, and it looks transparent. I will try to adapt a tube to take pictures with my Nikon.
I am looking for a sieve of 15 microns not to expensive too.
Goodbye and i hope good news soon.