Turn Your House into a Huge Jack-O-Lantern

Step 2 Cutting Posterboard

I found this to be an easy way to cut posterboard to get a clean straight cut. It also works when you print banners and have to trim edges before you tape the pieces together.

I'm demonstrating this on a piece of scrap paper because black posterboard just wouldn't show up. The marks on the paper were made with a marker instead of a pencil for the same reason.

My kitchen table opens up to accept leafs (leaves?). I yours doesn't, I can't help you.

Measure and mark the two edges where the cut will start and end.

Align the two marks on your posterboard with the seam in the table.

Tape the "scrap' side top & bottom as shown.

Insert the top edge of a sharp razor blade into the seam of the table above the posterboard and make a short sawing motion as you work through it.

Don't pull the blade up too far. As long as the blade stays in the seam you will not scratch the tabletop. Support the 'good' side close to the blade as you go and don't cut your finger.

I've done this with many banners, etc. and never scratched the table. When you're finished, you may have to run the blade across the entire seam because you'll see how much crap you cleaned out of the section you worked on.