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Check rims of jars for imperfections.
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Use canning jars.
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Use new lids.
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Use exact measurement of fruit.
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Use exact measurement of sugar.
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Follow your pectin instructions; we use powdered Sure-Jell.
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Add Pectin.
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Bring to hard rolling boil (a hard boil cannot be stirred down).
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Add sugar.
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Bring to hard rolling boil.
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Hard rolling boil for 60 seconds, time carefully.
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Use correct headspace (1/4 inch for jams).
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Wipe rims before applying lids.
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Tighten rings properly (snugly but not excessive force).
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Use correct processing time.
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Remove and let cool, do not adjust rings.
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Some jams take up to 2 weeks to set.
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Remove rings and wash in warm soapy water.
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Store in cool, dark space without rings.
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