Carpet manufacturers took steps to eliminate stale air years ago.
White carpet turning red underneath.
Carpet suspected of containing mold should always be examined on both sides.
Spots caused by benzoyl peroxide are yellow to orange in color on most carpet pinkish on blue carpet.
Those with much peroxide are bright yellow and exhibit an orange halo which moves outward as the bleaching action progresses the center turning yellow this is the only household product that causes this peculiar phenomenon the halo is a.
As the air is forced through these gaps it passes through the carpet which acts as a filter to the air.
This problem was all but eliminated by 1980.
The stain gradually appears over time.
Any pollutants in the air are trapped by the carpet and turn the carpet gray or black in that area.
Antioxidants used in the manufacture of rubber and petroleum from exterior asphalt sealants and or spills tracked in on shoes and casters may cause permanent discoloration to any resilient floor.
Yellow discolorations develop slowly by the transfer of trace amounts of asphalt residue through the accumulation of thousands of footsteps.
Often even if mold growth is not visible on the top of carpeting it may be occurring underneath the carpet where it can t be easily seen.
This caused some carpet areas to turn dark green not yellow.
Carpet in this condition is most likely not salvageable and should be disposed of and replaced.
Common pollutants that can contribute to the problem include smoke from cigarettes and candles cooking oils fireplace ash and dust.
All carpet colors except orange generate within woodland mansions.