Place 6 clean 250 ml mason jars on a rack in a boiling water canner. Cover jars with water and heat to a simmer (180°F/82°C). Set screw bands aside. Keep jars hot until ready to use. Preheating Bernardin® lids is not advised.

The sealing compound used for our home canning lids performs better at room temperature than it does pre-heated in simmering water (180°F). Simply wash lids in hot, soapy water, dry, and set aside until needed.

Preheating can lead to less vacuum being achieved during water bath canning, and to buckle failures during pressure canning. In a large deep stainless steel saucepan, combine cherries, sugar, red wine and cinnamon stick. Let stand at room temperature 3 to 6 hours.

Add lemon juice and 1/2 tsp (2 ml) butter or margarine to marinated cherries. Over medium high heat, stirring frequently bring cherry mixture to a boil. Simultaneously, in a separate small saucepan, whisk pectin into unsweetened juice.

Stirring constantly bring pectin mixture to a boil and then add to the cherry mixture. Over high heat, return the combined mixture to a full rolling boils that cannot be stirred down; boil hard 2 minutes. Remove from heat; discard cinnamon stick and skim off any foam.

Ladle hot preserves into a hot jar to within 1/4 inch (0.5 cm) of top of jar (headspace). Using nonmetallic utensil, remove air bubbles and adjust headspace, if required, by adding more jam. Wipe jar rim removing any food residue. Centre hot sealng disc on clean jar rim.

Screw band down until resistance is met, then increase to fingertip tight. Return filled jar to rack in canner. Repeat for remaining preserves. When canner is filled, ensure that all jars are covered by at least one inch (2.5 cm) of water.

Cover canner and bring water to full rolling boil before starting to count processing time. At altitudes up to 1000 ft (305 m), process - boil filled jars - 10 minutes.

When processing time is complete, turn stove off, remove canner lid, wait 5 minutes, then remove jars without tilting and place them upright on a protected work surface. Cool upright, undisturbed 24 hours; DO NOT RETIGHTEN screw bands. After cooling check jar seals.

Sealed lids curve downward and do not move when pressed. Remove screw bands; wipe and dry bands and jars. Store screw bands separately or replace loosely on jars, as desired. Label and store jars in a cool, dark place. For best quality, use home canned foods within one year.

Processing: At altitudes up to 1000 ft (305 m), process - boil filled jars - 10 minutes - 10 minutes.

Altitude-adjusted processing table: At altitudes up to 1000 ft (305 m), process - boil filled jars - 10 minutes