Don't use Printform - it can only print the visible part.
Instead, use a
PrintDocument Class (System.Drawing.Printing)[
^] and manually locate the label content onto the output. It allows you to specify everything about the print: font, size, number of pages you print it on, and so forth - so it's a lot more flexible, if more work that just dumping the form to the printer.
As usual, the link includes sample code.