Best background drop?

[skuba]

Hi,
I am new to these forum and kinda new in professional photography.
Actually, I take pictures of products to put them on an ecommerce website which I manage.
Most of the time I need to clip the images on photoshop, so I can apply it on a white background, because it looks better on the website.
I have here two lights with one 250w bulb each.
As a background I use one of those gray papers, that I don't the name. That what the guy that I replaced was using.
Is that the best paper for these kind of pictures? How do you call that paper?
Any suggestions that would make my work of taking and clipping images better?

Thanks a lot,