Understanding Garment Care
|The objective of fabricare is to clean and restore garments to a condition so they look new. Fabricare processes can be divided into two basic steps: soil removal and finishing. Soil removal generally is accomplished by immersing the soiled textile item in water or a solvent to dissolve or flush-out the soils present. Some type of mechanical action and a detergent aid in the removal of the soils. Cleaning with solvents generally is referred to as drycleaning, while cleaning with water is referred to as laundering or wetcleaning. The term laundering is used to describe machine washing in either domestic or commercial applications. Wet cleaning generally refers to hand washing of garments in a professional cleaning facility.
Dry cleaning of garments with perchloroethylene or petroleum solvents avoids saturating the fabric with water. While the clothes are immersed, the solvent does not penetrate the fibers of the fabric, thereby avoiding the possible swelling and shrinking that can occur with water saturation. The garments are inspected and pre-spotted for stains and heavy soiling by a trained “spotter”. After pre-spotting they are sorted by types of fabric, color and weight and then machine-cleaned in solvent containing detergent. The solvent is removed from the garments by draining, spinning and tumble dying with hot air. The recovered solvent is filtered and purified for reuse by a distillation process.
A typical wetcleaning cycle consists of numerous successive batch operations using detergents, soaps and bleaches, followed by a rinse operation. As in the drycleaning process, the garments are inspected and, if necessary, pre-spotted. Garments made of delicate fabrics are immersed in water containing detergent and gently hand washed, while heavier fabrics may be scrubbed. The garments are then rinsed, dried in a machine dryer, or hung dry and finished.
WHICH CLEANING PROCESS TO USE?
The factors determining the cleaning method used whether a garment is cleaned in water or solvent are: The types of soil present. The fiber composition and garment construction. The dye present in the fabric and the nature of the various trims, linings, or other findings that may be used in the garment.
The various dyes used to color fibers and fabrics can often determine whether or not an article is washed or drycleaned. In general, man-made fibers are solution-dyed and respond equally well to either process. Dyes used for rayons, on the other hand, respond very poorly to water. Silk and wool dyes often respond poorly to water, and silk garments are normally drycleaned rather than laundered or wetcleaned. Other types of dyes may respond well to water, but not so well in drycleaning solvent.
There are three basic types of soil:
Laundering and wetcleaning processes can be modified to remove some solvent-soluble soils with the addition of detergents or soaps. Detergents used for laundering are normally formulated with mild caustic materials. Because only milder detergents can be used in wetcleaning, the process is somewhat limited in its ability to remove oils. Similarly, drycleaning solvents can be enhanced with the addition of detergents to remove water-soluble soils. The degree of removal is dependent on the detergent used and the careful control of moisture during the cleaning process.
Fabrics are made of fibers. Many fibers respond well to both wetcleaning and drycleaning. There are exceptions such as wool, linen, silk and rayon which are subject to shrinkage and felting when in contact with water. In addition, protein fibers like wool and silk tend to degrade after contact with even the mildest alkalies found in the wetcleaning process.. Wools also do not respond well to excessive heat typically used in the laundering process. The scaly nature of wool fibers tends to collapse when subject to heat and mechanical action, producing irreversible shrinkage and felting of the fabric. This problem is enhanced in garments with a loose fabric construction, which tend to relax if the article is washed and shrinkage results. These effects can be minimized using a wet-cleaning (i.e., hand washing process.) Most fiber types are compatible with the drycleaning process because drycleaning solvent does not swell fibers and the clothes are cleaned at room temperature.
TRIMS & LININGS
Most garments have trims (e.g., buttons) of some sort that can determine how the garment is cleaned. In addition, various linings and other findings (e.g., felts, interfacing, pads) often are used in garment construction that can present problems when cleaning. If, for example, any differential shrinkage of tailored articles (e.g., men’s suits) occurs during processing, undesirable distortion and puckering can occur. This happens because the felts or linings used in the construction respond differently to the care process than the shell fabric. In general there is less chance for damage using the drycleaning process in place of wetcleaning.
Finishing processes used after wet and drycleaning vary, depending on the garments being processed, but generally involve steaming and pressing. Steam is used to relax wrinkled fibers. After steaming, the fibers are pressed and cooled to keep them in place. Pressing is the most important step, requiring considerable skill and training. As a general rule, finishing after wetcleaning is more labor intensive than that of drycleaned items.
Many factors determine whether a drycleaning or a wetcleaning process is compatible with a particular garment or textile article. Your professional cleaner, therefore, must use his or her professional judgment to determine which process will restore the garment to a condition that is as close as possible to its “look like new” state.