Hold the knife blade parallel to the upholstery foam and make a deliberate, shallow cut along the entire line — in one direction.

How to cut foam straight. This foam cutting saw has a base that rides on tiny wheels to prevent friction, and the large area of the base keeps the blade straight up and down. 1.5 use foam cutting machine. Lay a sheet of polyurethane foam on a pad.

The slower you pass the knife through the foam, the more control you maintain. When cutting, use firm, steady pressure and cut in one smooth motion. Lay the blunt side of the knife directly above a part.

A long (with a longer blade than how thick the foam is) knife, preferably a utility knife. It can be used to cut a new channel. Make sure that the fishing line of the future cut is on the cardboard.

The best way to avoid this is placing a straight edge along your cutting line and applying pressure as you make your cut. Place your foam on a flat surface and use the marker pen and ruler to plot out where you’ll be cutting. Use a utility knife and straightedge to cut through thin board in several passes.

Simply position the foam board so that it is lined up at the desired slicing location, same as you would with a basic paper cutter. The foam carving knife is helpful for jobs that involve cutting both flat and curved surfaces or creating edges. Also, whatever you decide to cut with should be held as horizontally as possible.

It's the dumb way to cut foam. Enter the foam from an outside edge and do not stop. 1.3 pick up the foam.