Before you begin, prepare calcium water.To do this, combine ½ teaspoon calcium powder (in the small packet in your box of Pomona’s pectin) with ½ cup water in a small, clear jar with a lid. Shake well.Extra calcium water should be stored in the refrigerator for future use.
Wash jars, lids, and bands. Place jars in canner, fill canner 2/3 full with water, bring to a boil. Turn off heat, cover, and keep jars in hot canner water until ready to use. Place lids in water in a small sauce pan; cover and heat to a low boil. Turn off heat and keep lids in hot water until ready to use.
Combine the pineapple juice, orange juice, lemon juice, and calcium water in a large, non-reactive pan. Set over high heat and bring to a boil.
Cook at a hard boil for 5 to 6 minutes.
Stir the pectin powder into the juice concentrate. Add the concentrate-pectin mixture to the boiling juice and stir vigorously.
Bring the juice back to a boil and cook for an additional 2 to 3 minutes. Remove the pan from the heat.
Fill hot jars leaving ¼” of head space at the top. Wipe rims clean. Screw on 2-piece lids. Put filled jars in boiling water to cover. Boil 10 minutes (add 1 minute more for every 1,000 ft. above sea level). Remove from water. Let jars cool. Check seals; lids should be sucked down. Eat within 1 year. Lasts 3 weeks once opened.
Notes
Naturally Sweet Food in Jars by Marisa McClellan is a lovely cookbook containing 100 lower-sweetener preserve recipes made with coconut sugar, maple syrup, maple sugar, agave, fruit juice concentrates, and dried fruits as sweeteners. Some recipes are for jams or jellies that use Pomona’s Pectin; many are for other types of preserves — glazes, shrubs, pickles, sauces, chutneys — that don’t require any pectin. This book is a wonderful opportunity to broaden your preserving repertoire.