What's a good backdrop for shooting small to mid size objects such as flowers, table place settings, etc.?

My lighting equipment consists of a Medium Photofex softbox and w 1000W and 500W incandescent bulb and I also have 2 umbrellas - one shoot thru and the other opaque. I'll be shooting film (B&W, C-41 and E-6) with 35mm, 645, 6x7 and 4x5 cameras.

I have a Calumet Calumet Posing Table and a Calumet Tabletop Studio but also have access to larger table such as end-tables and coffee tables, etc.

Thanks and Happy Holidays,

Thomas