Use yellow-flesh peaches only. Do not use this canning process for white-flesh peaches.
Dip peaches in boiling water for 30 to 60 seconds until skins loosen, then cool quickly, slip off skins, halve, pit, and slice if desired. Hold peeled fruit in ascorbic acid solution to prevent darkening.
For hot pack, bring drained fruit to a boil in syrup, water, apple juice, or white grape juice. Fill jars with hot fruit and cooking liquid, leaving 1/2-inch headspace. Hot pack is recommended for better quality.
For raw pack, fill jars with raw fruit, cut side down, and add hot water, juice, or syrup, leaving 1/2-inch headspace.
Boiling-water process hot-pack 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. Raw-pack pints process 25/30/35/40 minutes and quarts 30/35/40/45 minutes at those elevations.