Cosmetology · Sanitation, Disinfection and Sterilization

Why is following the disinfectant's 'contact time' (also called dwell time) important?

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Correct answer

The surface must stay wet with disinfectant for the full labeled time to actually kill pathogens

A It is not important
B It only affects the smell
C Longer is always harmful
D The surface must stay wet with disinfectant for the full labeled time to actually kill pathogens

Why this is the answer

Contact time (or dwell time) is the amount of time a disinfectant must remain wet on a surface to effectively kill the pathogens it claims to destroy, as stated on the product label. Wiping the disinfectant off too soon means the organisms may not be killed, leaving the tool unsafe. Cosmetologists must immerse or thoroughly wet tools and leave them for the full required time before rinsing and drying. Respecting contact time is essential for disinfection to actually work, and it is frequently tested.

Source: Scientific Concepts — Contact Time

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About this topic: Sanitation, Disinfection and Sterilization

Sanitation, disinfection and sterilization are three different levels of cleanliness, and the exam tests which is required for which tool, which products achieve each level, contact times, and how to handle blood exposure. This is one of 9 Scientific Concepts questions on sanitation, disinfection and sterilization, each with a full explanation on a single study page.

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Why is following the disinfectant's 'contact time' (also called dwell time) important?

Why this is the answer

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About this topic: Sanitation, Disinfection and Sterilization

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