Michigan State University Extension
Preserving Food Safely - 01600895


3-l/2 lb. ripe plums                                        
3 lb. ripe Concord grapes                                   
1 cup water                                                 
l/2 tsp. butter or margarine to reduce foaming (optional)   
8-l/2 cups sugar                                            
l box (l-3/4 oz.) powdered pectin                           

     YIELD:  About l0 half-pints                            

     PROCEDURE:    Wash   and  pit  plums;  do   not   peel.
Thoroughly crush the plums and grapes, one layer at a  time,
in  a  saucepan  with water.  Bring to a  boil,  cover,  and
simmer  l0  minutes.  Strain juice through a  jelly  bag  or
double  layer of cheesecloth.  Measure sugar and set  aside.
Combine 6-l/2 cups of juice with butter and pectin in  large
saucepan.   Bring  to a hard boil over high  heat,  stirring
constantly.   Add  the sugar and return to  a  full  rolling
boil.  Boil hard for l minute, stirring constantly.   Remove
from  heat,  quickly skim off foam, and  fill  hot,  sterile
jars, (see directions  below  for  sterilizing jars) leaving
l/4-inch headspace.  Adjust lids and process.               

     Sterilization of Empty Jars                            

     To  sterilize  empty  jars, place them  right  side  up
on  the rack in a boiling-water canner.  Fill the canner and
jars with hot (not  boiling)  water to 1 inch above the tops
of  the  jars.   Boil  10  minutes at altitudes of less than
1,000 feet.  At higher elevations,  boil 1 additional minute
for each additional 1,000 feet elevation.   Remove and drain
hot sterilized jars one at a time as filled.                

                 IN A BOILING-WATER CANNER                  

                   Process Times at Altitudes of            

of         Jar       0-             1001-           6001-   
Pack       Size      1000 ft.       6000 ft.        8000 ft.

Hot     Half-pints   5 min.         10 min.         15 min. 
        or pints                                            
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