All
Pre-Sprays Are Not Created Equal
You’ve probably heard a carpet cleaner say, “the price
includes a pre-spray to remove your spots.” Did you respond with “That’s great,
sign me up”? WAIT! Not all pre-sprays
used in professional carpet cleaning are right for every job. There are a few
more things you should know.
Pre-spray is one of the first steps in cleaning carpet. The pH
of a cleaning product plays a major role in the quality of a carpet cleaning
job, and it is important that the cleaner understands how it works. The pH
scale ranges from 0-14, with neutral being 7. The lower end of the scale is
acid, and the higher end is alkaline.
Generally, choosing a cleaning formula with a pH opposite of
the soil type’s pH produces the best results. For example, acidic soils such as
fruit juice spills should be cleaned with an alkaline cleaner. It is important
to choose the appropriate cleaning formula, as using the incorrect pH for the
fiber type, or strong pH levels in either direction, can destroy fibers and
negatively affect dyes.
Most cleaning chemicals for synthetic fibers are alkaline
(high pH) in nature, since soil removal happens best at alkaline pH levels. High
pH (alkaline) cleaners work well on olefin, polyester, nylon, and acrylic
fibers. It also works well to remove
protein stains, oils, and grease from fibers. Wool is a protein, and requires
cleaning chemicals with mildly acidic pH levels.
While high pH or
alkaline cleaners can be the best cleaning option for many textiles, and the
outcome can be sparkling, they leave the fibers prone to re-soiling quickly and
can leave the carpet with a sticky or crunchy feel. This is why it is important
to neutralize pH.
The natural pH of most carpet fibers is near neutral (7).
For wool, the natural pH will be between 5.5 and 7. For the life of the fiber
and to keep from attracting soils, we should leave the fibers as close to
possible to their natural pH when we have finished cleaning. Treating the fibers
with an acid rinse agent accomplishes this.
So, ask what pre-spray formula is best for your carpet type,
and make sure the company is neutralizing the pH following the cleaning. If you
are having natural fibers such as wool or silk cleaned, make sure the company
is taking precautions to protect the fibers and dyes.
Our cleaning products are chosen specifically for every job.
Our technicians are trained to determine the type of fibers he is cleaning, and
use the appropriate formulas. He will also attempt to identify each type of
stain to determine the appropriate cleaner to remove it, and will neutralize
the pH of the carpet once finished using our fabric softening rinse.