Jim Kelly demonstrates how to fold super heavy card stock without cracking the toner or paper using MBM's 352F heavy duty friction-feed folder. Folding sheets this thick would normally require an expensive stand-alone knife folding system, but we've discovered an inexpensive alternative to knife-folding wherein you can easily perform Z, Gate, Double Parallel, Half and a variety of other folds with sheets up to 350gsm (included coated and laminated stocks) by simply pre-creasing your sheets directly on the fold points.