Scanning printer paper comes out grey

[vertigo]

Hi,
Got a good scanner here, when a page is white it scans white. However, I'm having real problems with paper that's suitable for printers. It scans the white as splotchy grey.
Anyone know which filter or setting I should be applying to get this to come out white?
I've tried line-art but this makes the words awful and doesn't allow for colour scanning at all.
Any help gratefully appreciated.
Thanks, Me.

[bangaio]

I think, and this is a guess, that the scanner is not doing any white balance. If it's anything like a camera it may be out of calibration abd this may make it grey or....it's not exposing correctly. Underexposed snow in a camera looks like grey stuff.

Is there a way to get your scanner to change exposure or white balance or calibrate the sensor or lamp?

[vertigo]

Found the white balance controls now, thanks. It scans pure white pages like those in a magazine perfectly white, just seems overly aggressive towards the obvious non-whiteness of your standard bit of A4, but there's no way the paper's a mid-grey. The controls are a bit **** and the preview window's the size of a postage stamp, which is a real pain in the arse. I have to scan every time I make an adjustment to check that I've got the settings right.