Neglected animal stains haven been a problem ever since the first "accident".
Two types of reactions can take place between the chemicals in the urine
and those in the fiber dye.
Some dyes change color as soon as urine comes in contact with them. Often
original color can be restored b immediate addition of a weak solution
of ammonia or white vinegar. But first pick an inconspicuous area of the
carpet and test small amounts of solution to determine its effect on the
fiber and dye.
The other change develops slowly over a period of several months and results
in permanent change in the fiber dye. Not only is there a dye change but
some fibers become weakened or are destroyed. After cleaning, these areas
are more obvious because the soil, which hid the true color, has been
removed.
The next time you are confronted with an animal "accident,"
immediately absorb as much liquid as possible. Wash the area with a solution
of one teaspoon of neutral detergent (which contains no bleach) to one
cup of lukewarm water. Absorb into white tissues or toweling. Add a white
vinegar solution (one part white vinegar to two parts water). Absorb as
dry as possible. Place a ½ inch layer of white absorbent material
over area and weight down. Allow to dry.
If immediate action is taken to remove the stain in this manner, little
or no change in color should occur and that forgotten "accident"
will not become apparent after your carpet has been professionally cleaned.