I asked for a sample square of a polypropylene backdrop to be sent up a while ago and after seeing how it seemed to defy creasing ( or at least iron itself back into shape ) I bought a roll of white.

I have used it once, yesterday , deliberately with no lighting on it and it seems to take on a very even ( almost neutral grey ) colour and texture and doesn't impart a colour cast. I will experiment more with lighting on it this weekend to see how it spreads light.