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Home ] Red Marks from Fluorochemical Treatment Research ]


Red Discoloring

Red Marks from Fluorochemical Treatment Research

Red or Orange stains can come from various sources. If the red discoloring is darker than the surrounding carpet, then red dye and/or pigment has been added; if red discoloring is lighter than the surrounding carpet, then blue and/or yellow dye are missing. A thorough search into the cleaning and installation standards as well as many other reference materials yielded this list.

bulletThe DuPont® Company has done studies on urine. These studies state that urine create changes in color on nylon face yarns. If a urine stain is red and darker than the surrounding carpet, then red dye could have been part of the urine. In most cases, yellow dye will be associated with urine.
bulletFrom Dye – from beverage stains, such as Kool Aide® and other drinks or food products with red dye cleaning products. Red dye is very common in strawberries, cherries and many other things that are consumed. A beverage stain will have a splash pattern and will be darker than the surrounding carpet.
bulletFrom indicator dyes that change colors with pH. - pH dyes are rare in carpet; more common in upholstery. However, when carpet turns red after being soured, (typically through an acid rinse product); and the problem is corrected by raising the pH over 7.0, and can be made to occur again by lowering the pH under 7.0; then an indicator dye is the culprit. The responsible party is likely subject to arbitration.
bulletJute, with 24% lignin was left in the presence of alkalinity. Jute is commonly found in the carpet backing. It is a cellulose fiber, thus it is subject to true cellulose browning. A 3% solution of hydrogen peroxide will generally correct this. In most cases, jute-backing cellulose browning is due to over wetting or improper drying. In most cases, it is due to a cleaning technician error. Documentation of this problem can be found in the CARPET CLEANERS handbook, but the ACADEMY OF TEXTILE & FLOOR, author Carl Williams.
bulletPolymer of 20 monomers of tetrafluoroethylene (fluorochemical), (Teflon or Scotchgard) is inherently red and may leave red discoloring after it has been applied. There is no other written source known to confirm this. Click to see more on this topic. There is an inspection report written on this.
bulletRust, created from iron oxide. Some truckmounted carpet cleaning machines such as the Bates Big Red can from rust in the heat exchanger and deposit it into the carpet. Some insurance companies will consider this an equipment malfunction and will insure this situation for the cleaner. Click here to see an inspection report on this topic.
bulletOver wetting can result in browning. In most cases this is easily corrected with a light wand steam cleaning or an absorbent pad cleaning. When it does not, and the backing is all natural, the red materiel may be from Georgia Red Clay wicking into the yarn. This problem can generally attributed to improper vacuuming, over wetting, and/or improper drying.