SEM Images showing dust distribution

Scanning Electron Micrographs (200x magnifications) showing dust distribution in the top, middle and bottom layers of a new residential carpet. The images show the carpet layers before and after contamination with ATD (Allergen Test Dust), followed by cleaning consisting of vacuuming and hot water extraction.

Before Dust Contaminationtop-before-adtmiddle-before-adtbottom-before-adt
After ATD Introductiontop-after-adtmiddle-after-adtbottom-after-adt
After Cleaningtop-after-cleaningmiddle-after-cleaningbottom-after-cleaning

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