Reporting question for Fiberboard - Vulcanized, 3" x 15", .062" Thick

Product:
Fiberboard - Vulcanized, 3" x 15", .062" Thick

Question:
Is there good, straight way to cut these? A ruler and a utility knife maybe?

Answer:
There are a few ways people cut these boards, the ruler and utility knife may work, but the most popular method seems to be using a tile guillotine.