Quote Originally Posted by polyglot View Post
Since your problem is the supporting surface and not the background, have you considered working with instead of against it? For example, you can get a slab of black glass or 600x600mm polished black tile pretty cheaply and use that as your object support. Being black, it will have practically no diffuse response to your lighting but it will reflect a copy of the subject. That can look good in particular with darkfield lighting.
Yes, what he said, and also with black perspex, which if you live near an art supplies shop, is cut into handy sizes, and less bitey.

This is actually one of my favourite techniques for shooting things, as demonstrated here:
http://mrmarcmorel.wordpress.com/201...s-in-a-bottle/ On a white field, and here: http://mrmarcmorel.wordpress.com/201...rom-the-vault/ doing tricky stuff with a lit backdrop...