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Sunday, November 23, 2014

Question

Over the past summer, one of our carpet cleaners let a wet carpet bonnet sit on a classroom carpet for approximately one hour. The water from the bonnet soaked into the nap and left a nasty brown circle where the bonnet had been The brown stain remained even after the carpet had dried. We have attempted to re-clean the carpet, but we have not been able to remove the brown circle where the bonnet had been. Do you have any tips or tricks for removing it?


Answer

Since modern carpets don't usually have a jute backing anymore, I can't imagine the browning showing up from the overwetting of that, with the color wicking up from below.
Perhaps the bonnet was heavily soiled and the residue from that is what you are seeing in the carpet fiber. I assume you cleaned by bonneting again, and possibly you need to shampoo and rinse extract to release the soil.
Consider the possibility that an acid-based rinse agent (anti-browning) will release the browning when applied properly.

Lynn E Krafft, ICAN/ATEX Editor
lekrafft@juno.com