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