How to properly grease a ground-glass joint.

ungreased & properly greased | poorly greased & grease instructions | cleaning grease

ungreased ground-glass joint

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greased ground-glass joint

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poorly greased ground-glass joint

(too much grease AND not a snug fit - note air bubbles)

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use a SMALL amount of grease!

(add to top of male joint, spread with finger or paper towel)

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use acetone or hexane
to clean greased joints

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before (looks clear) &
after (looks white)

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