How to hide table borders on printer-friendly page

Hello,

I have the opposite problem - I have set borders to have thick, black lines on the print page, which show up on the print preview.

However, when I physically print the page, the thick borders still only print as thin, grey lines.

Is this a problem you have come across before? I would really like the print preview to match the physical page. I know it is probably a printer driver issue, but any tips as to how to make this work would be greatly appreciated.

This is an example fo the preview - but it only prints all table borders in thin grey lines.

Best regards,

Craig