Why do emulsions sometimes have a “Monday Morning” smell?

emulsions smell
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Why do emulsions sometimes have a “Monday Morning” smell?

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This smell is caused by microbial attack of the emulsion by bacteria, yeast, and fungi. Reasons for the attack are: • Reduced biostability due to low concentration • Tramp oil on the surface of the emulsion and poor aeration promote the growth of anaerobic bacteria. • Instable emulsions (see item 1) have low bio resistance. • The mixing water has microbial contamination. • The machines and systems have not been cleaned before the refill.

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