First, set everything up... Set your oven to 250. Bring a pot of water to a boil. Line baking sheets with parchment paper.
Mix together spices and sugar. Set aside.
Prepare the pears. Remove the top and bottom and slice them on mandolin setting #2. Then boil pear slices for 1 minute.
Drain pears and arrange them on cookie sheets. Sprinkle the spice mixture on the pears and put them in the oven. Check on your pear chips every 30 minutes. Depending on the oven, estimate 1.5 - 2 hours of continuous bake time. It takes a bit of guess work and sampling to tell when they're done. You may want to flip them for the final 30 minutes. The chips will usually crisp up after a few minutes drying out of the oven.