{
  "title": "Peach Jar Calculator Constants",
  "author": "Ashley Farris",
  "version": "1.0",
  "date": "2026-07-17",
  "source": "USDA National Center for Home Food Preservation, Complete Guide to Home Canning, Pub. No. 539 (2017)",
  "license": "CC0-1.0",
  "constants": {
    "syrup_concentrations": {
      "light": {
        "percentage": 30,
        "sugar_cups_per_gallon": 2.5,
        "water_gallons_base": 1
      },
      "medium": {
        "percentage": 50,
        "sugar_cups_per_gallon": 4.5,
        "water_gallons_base": 1
      },
      "heavy": {
        "percentage": 65,
        "sugar_cups_per_gallon": 6.5,
        "water_gallons_base": 1
      },
      "extra_heavy": {
        "percentage": 75,
        "sugar_cups_per_gallon": 8.0,
        "water_gallons_base": 1
      },
      "juice_only": {
        "percentage": 0,
        "sugar_cups_per_gallon": 0,
        "water_gallons_base": 0
      }
    },
    "processing_times_minutes": {
      "boiling_water_bath": {
        "half_pint": {
          "hot_pack": 20,
          "raw_pack": 23
        },
        "pint": {
          "hot_pack": 23,
          "raw_pack": 25
        },
        "quart": {
          "hot_pack": 25,
          "raw_pack": 30
        }
      },
      "pressure_canning_note": "Gallon jars require pressure canning at 10 PSI for 40 minutes (not covered by water bath calculator)"
    },
    "headspace_in_inches": {
      "liquid_fill": 0.5,
      "solid_pack": 1.0
    },
    "yield_estimates": {
      "pounds_per_pint_jar_peeled_sliced": 2.2,
      "range_low": 2.0,
      "range_high": 2.4
    },
    "altitude_correction": {
      "formula": "adjusted_time = base_time * (1 + altitude_ft / 10000)",
      "examples": {
        "sea_level": { "factor": 1.0, "percent_increase": 0 },
        "2000_ft": { "factor": 1.2, "percent_increase": 20 },
        "5000_ft": { "factor": 1.5, "percent_increase": 50 },
        "10000_ft": { "factor": 2.0, "percent_increase": 100 }
      }
    },
    "cooling_protocol": {
      "uncovered_minutes": 20,
      "then_cover_and_cooldown": "until room temperature"
    }
  },
  "validation_notes": [
    "All times derived from USDA Pub. 539 Table 29: Processing Times for Acid-Fruit Products",
    "Altitude corrections applied per USDA Chapter 3: Adjustments for Altitude",
    "Syrup concentrations standardized to Table 29 specifications",
    "Headspace requirements per Chapter 2: Preparing Jars and Fillings"
  ]
}