 | The 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. |
| From 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. |
| From 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. |
| Jute, 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. |
| Polymer 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. |
| Rust, 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. |
| Over 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. |
