Michigan State University Extension
Preserving Food Safely - 01600966


     Even  though  sugar helps preserve  jellies  and  jams,
molds  can grow on the surface of these products.   Research
now indicates that the mold which people usually scrape  off
the  surface of jellies may not be as harmless as it  seems.
Mycotoxins  have  been found in some jars  of  jelly  having
surface  mold growth.  Mycotoxins are known to cause  cancer
in  animals;  their  effects  on  humans  are  still   being

     Because of possible mold contamination, paraffin or wax
seals  are  no  longer recommended  for  any  sweet  spread,
including  jellies.  To prevent growth of molds and loss  of
good flavor or color, fill products hot in hot sterile half-
pint  Mason  jars,  leaving  1/4 inch headspace,  seal  with
self-sealing  lids, and process 5 minutes in a boiling-water
canner.  Correct process time at higher elevations by adding
1  additional  minute  per  1000 ft.  above  sea  level.  If
unsterile  jars  are used, the jars should be  processed  l0
minutes.  Use of sterile jars is preferred, especially  when
fruits  are low in pectin, since the added 5-minute  process
time may cause weak gels.                                   

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