Article: Plastic-cutting blades have a higher tooth count than a standard wood-cutting blade. This allows for a smoother cut without having jagged edges. It also helps prevent kickback if you're using an electric saw. Ensure you're using a blade meant for cutting plastic. Use a thicker blade so the plastic does not melt and stick back together. If you are trying to cut out smaller windows in larger sheets or making small handheld crafts, use a craft blade to chip away small bits of plastic. Drill holes to use as starting points for the blade and shave away the plastic until you reach the guide lines. Clamp a piece of straight wood across the plastic with the line you intend to cut hanging slightly over the edge to cut a straight line. Guide the saw through the plastic sheet, keeping your hand on the wide portion of the saw shoe. Jigsaws allow for better mobility as you make curved cuts into the plastic. Using a blade with 10 teeth per inch, turn the plastic to make the shapes you need. Drill holes in the plastic along the guide lines so your blade has places to start and stop easily. Make straight relief cuts from the outside of the plastic to the curves. This will help prevent the plastic from warping and shortens the cutting distance. Leave room between the guide lines you've drawn and where you cut. You can always file these down later. This type of saw makes cuts only when you pull it, unlike other hand saws that cut when you push and pull it. A pull saw helps make a cleaner, smoother line in your plastic and may be easier for making shorter straight cuts than an electric saw. Use your thumb to guide the blade when you make the initial cut. From there, place the saw into the line you've made and pull the saw through.
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Use blades meant for cutting plastic. Use a craft knife to make smaller cuts. Cut long, straight lines using a handheld circular saw and straight-edge. Create curved cuts by using a jigsaw. Make short, straight cuts using a Japanese-style pull saw.