Things You'll Need
Instructions
Measure the length of the soap, and divide it into equal proportions. Score a line across the soap as a cutting guide.
Place the soap inside a miter box with the widest side laying flat. Hold the bar tight against the straight-cut notch that is closest to you. Miter boxes have slots to cut straight or diagonal cuts.
Hold the pastry scraper with your dominate hand, and secure the soap with your other hand.
Insert the pastry scraper into the straight-cut slot until it reaches the soap bar.
Position your body over the miter box for maximum leverage. Push the pastry scraper through soap.
Continue cutting the soap, by sliding the soap bar to the next cutting line and slicing with the cutter.