
The traditional advice for cutting foam core is to make two passes, one through the top layer of paper and foam and the second through the bottom later of paper. How tedious. After many trials (and errors), I have found that I can make very clean and straight cuts with just one pass of the blade. This not only saves time but keeps any of those annoying rips of the back paper from happening. I work at a low table and this can be hard on the back, but being able to make one pass makes it so much faster that this complaint is disappearing. I have a higher workspace available, but feel the lower table is best for positioning my body directly above the area to be cut. It reduces wrist fatique and that is definitely a consideration with all the time spent on the computer and at the easel. In the picture above you see my preferred tools:
a thick straight edge- my level works well both for measuring and keeps my hand out of harms way as I use it to guide the cuts
a pencil- to mark both ends of each cut
a cutting mat- saves not only the table, but the blades last longer. also essential for cutting through all layers at once.
a box cutter or utility cutter-as others have said before, snap off blades are awesome. The tool I use is perfect because I can dial up the blade to such a length that the edge of the blade’s sheath rests along the top edge of the level and provides enough blade depth to go through all layers at once.
The steps:
1. Measure and mark the starting and ending points for each of the cuts for your first piece.
2. Align the straight edge (in my case, level) with the two marks.
3. Slide blade forward in it’s sheath and press into the foamcore at the starting point for the first cut and so that it is pressed against the straight edge.
4. Hold straight edge very firmly with one hand and while pressing in firmly with the other draw blade the length of the cut.
5. Repeat, making adjustments in pressure used as necessary.
Tips:
Don’t skimp on blades. A sharp blade makes all the difference. Snap off the top piece of your blade after each full sheet of foam core.
Use a cutting mat. If you don’t have a self-healing mat for crafts, try one of those silicone cutting boards.
If you use a metal straight edge such as a square or triangle, watch out for black residue on your fingers and foam core. Wash and dry your hands well before packaging your prints with all those wonderfully cut pieces of foam core.