Wash and peel pears. Cut lengthwise in halves and remove cores. Hold prepared pears in ascorbic acid solution to prevent discoloration.
Boil drained pears 5 minutes in syrup, apple juice, white grape juice, or water. Raw packs make poor-quality pears.
Fill jars with hot pears and cooking liquid, leaving 1/2-inch headspace.
Boiling-water process pints 20/25/30/35 minutes and quarts 25/30/35/40 minutes at 0–1,000/1,001–3,000/3,001–6,000/above 6,000 ft.