Peel the skin off of each pear.
Cut pears into 1/4 inch thick slices with a knife or mandolin slicer. Then cut pear slices in half sith a sharp knife. And be sure to remove the seeds.
Add 1 cup of lemon juice to 4 cups of water. Then soak pear slices in mixture for 10 - 15 minutes.
Lay each pear slice out, evenly spaced, on a food dehydrator tray.
Dehydrate at 135°F for 8 - 12 hours until slices are pliable.