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Customizing wetcleaning loads
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To do proper wetcleaning, it is necessary to customize the loads you are
running.
This means adding the proper detergent with the proper additives in a specific
formulation for that particular load.
Although the manufacturers have provided the proper chemistry, often cleaners do
not understand how the chemistry works and are sidetracked with the easy way
out.
Wetcleaning is an art and the more knowledge you have the better cleaning
results you can obtain. There are many manufacturers who offer different
formulations, but cleaners are not maximizing the chemistry that is available.
Facts about wetcleaning detergents
Anionic. These detergents have a negative charge surfactant that cleans fabrics. Anionic
detergents obtain maximum cleaning results on most fabrics but are not designed
for wetcleaning wools, silks and fabrics with poor color fastness.
Cationic. These detergents have surfactants with a positive charge. These detergents tend
to stay with the fabric and provide a softness to the fabric. They are
therefore very useful for cleaning wool, silk, rayon and other delicate
fabrics. It is important to note the negative charge properties of this
detergent.
If cleaners pre-spot fabrics with an anionic detergent and then wetclean it with
a cationic detergent, there will be a breakdown of the detergent causing
insoluble rings and swales.
Anionic and cationic detergents are not compatible with each other. The rule is
that you must always avoid mixing anionic and cationics.
Nonionic. These are detergents that are neutral without a positive or negative charge.
They can be used to clean garments as an additive with any detergent. They do
not cause a breakdown in any detergent.
Nonionic detergents also provide a certain degree of softness to the fabric.
Nonionic detergents have an ability to remove grease and oil. They are
therefore effective in wetcleaning pre-spotting formulations. Nonionic
detergents do not have capabilities of removing ground-in soil.
Additives
Manufacturers provide detergents with additives or cleaners can add them
separately. Additives provide better cleaning and also add additional safety to
fabrics and color.
Alkalis. These are chemicals that release hydroxyl ions in the presence of water. Alkalis
increase cleaning power of any detergent or pre-spotting detergent.
For example, if I wetclean a load of khakis with just using anionic detergent,
there will be only a certain degree of soil removal. If I add alkali to that
detergent, I can possibly double the soil removal capabilities of the
detergent. Some manufacturers formulate their detergents with an alkali to
provide better cleaning for khakis, denim and raincoats.
If I add alkali to a pre-spotting agent, the pre-spotting agent becomes much
more aggressive. If I add it to a nonionic detergent the oil and grease stain
removal potential is increased.
If you are wetcleaning a heavily soiled load, you can add one to two ounces of
ammonia (28) per gallon of water. If the detergent is already alkaline-based,
you may not have to add as much alkali to increase soil removal.
Acids. These are agents that release hydrogen ions in the presence of water. Acids have
the ability to provide color stabilization and softness to wool and silk.
Most cationic formulations are acid in nature, but additional acid in the load
for stabilizing poor color fastness can be done. The most versatile acid to add
to loads is acetic acid. You can add one to two ounces of acetic acid per
gallon of water.
Acetic acid can be used in the rinse water to neutralize highly alkaline
detergents. Acetic acid can also neutralize bleaches. Acids can also be used to
add to loads that are stained with excessive amounts of tannin stains.
Enzymes. Detergents with enzymes provide additional stain removal. The enzymes used in
detergents can withstand high water temperatures up to 140°F. They are also stable in the presence of mild acid, alkali and bleach.
Sodium percarbonate. This is a mild oxidizing bleach that is used in detergent
mixtures rather than sodium perborate. Sodium percarbonate releases more oxygen
than sodium perborate and dissolves more easily in cool water.
When used in detergent formulations, it has been found to be safe to most
wetcleanable items providing the water temperature is cool. They should not be
used on wool and silk.
Softening agents. These are cationic additives used to soften the fabric and texture. They are
essential when wetcleaning wool and silk. They are usually used in the rinse
water when cationic detergents are used.
Garments that are treated properly with softening agents usually do not have to
be drycleaned to soften the fabric after wetcleaning.
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