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Retsch MM400 mill

Grinding Jar

Each grinding jar has the main jar, the lid and ball. The inside of the jar and lid are lined with agate and the ball of made of agate. Poor freeze dried soft sediment (not hard rock) sediment grains into the jar. Fill the jar half way to three-fourths of the way up with sample. Place one ( can do two) grinding balls in the jar. Clean off any of the sediment sample with a kimwipe that has gotten onto the jars threads and screw the lid on. Be mindful not to cross thread the lid to the jar.

Loading the Jar into the Grinding Mill

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