Performance Carbide American Graphtec-AMERIGRAPH / Western Graphtec

"45 degree blades are the most frequently used. 60 degree blades are recommended for thicker or tough to cut materials like reflective."

"Customers sometimes complain that their brand new plotter blade is getting dull quickly. Often it's not the blade, but adhesive from the vinyl collecting on the blade itself. Cleaning the tip of the blade with alcohol usually corrects the problem."