They need to have an adhesive side. I dont think glue works. Also other ideas with double sided tapes etc is problematic, because they will introduce additional interference to the polarized light. Im also not aware of a "consistant" source for these polarizers (especially if you dont want to buy professional grade optical equipment). Sometimes cheap polarizers from the marketplace of your choice work well, but may be out of stock a few month later.

So I would say I need a 0° polarizer, right ? To be noted : with that monochromatic Toshiba T1900 laptop there is an option in the bios to reverse the grayscale, current picture is in non reversed mode.