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“ASK, IF YOU DON’T KNOW

“ASK, IF YOU DON’T KNOW” Eng. Vittorio Cianci and his Staff are on hand to answer all your questions sent via email to the addresses indicated below. (Clear answers to complex problems).

• Questions regarding technical problems related to the materials, defectiveness, toxicity, complaints, advance info on materials and care problems, textile chemistry applied to cleaning
• Questions concerning disputes
• General information
• Textile care and industrial chemistry issues affecting washing

THE EXPERT’S ANSWER
Questions should be sent to info@deterg.eu or lart@lartessile.it
The most interesting questions and related answer will be published

ANSWERS TO QUESTIONS

How to check for the presence of water in the machine and what is the potential damage?
Mr. Giorgio Grasselli who owns the 3Più laundry answered this question personally: checking to see if there is any water inside a dry cleaning machine is not a simple matter when the machine is not in operation, you can only see it during the washing cycle when the solvent becomes milky and cloudy, but the damage has already been done. To avoid this: clean the solvent separator frequently after distillation, the dust deposited during solvent/water separation allows the pearl-shaped drops to go to the recovery tank (insufficient filtration defect). Damage reported: wool felting, cotton and viscose shrinkage, color bleeding.

Why does washing cause pilling on cotton garments?

Often, short filaments of cotton that measure 2 – 2.5 cm. in length are used because they cost less. The mechanical action of washing and of rubbing causes the fiber tips to break loose which then cover the fabric with a short, dense lint similar to a light-colored dew, partly because these tips become discolored and partly because of the reflected light: this makes the garment look worn. This is a bigger problem in garments (such as padded jackets and duvets) made of polyester- or nylon-cotton blends because the cotton fibers slide on the polyester and break loose more easily and also because sometimes the cotton is not dyed and stands out on a colored background.

Why do leather garments sometimes shrink?
There are two reasons for shrinkage. 1) Some leathers are stretched excessively during manufacture, they shrink during washing and do not always return to their original size when worn if they have shrunk too much. If the leather has been stretched too much, the shrinkage will be more obvious, and in this case there is nothing that the drycleaner can do. 2) Mr. Giorgio Grasselli maintains that leather is moisture-sensitive, therefore if it enters into contact with solvent-water it swells and when heat-dried it felts and shrinks (protein fiber) and often loses its suppleness (irreversibly). Why do white microfiber garments become gray and difficult to wash? Microfiber is a thin fiber that has a diameter of less than 10 micron or less than 1 denier (9,000 meters of fiber weigh 1 gram). Microfibers do not exist in nature; silk is the finest natural fiber and is > 12.5 micron. With the same yarn count and thickness, if the yarn components are fine this means that there is a bigger space between fibers: the greater the number of fibers, the greater the space. The dirt that a garment is exposed to when worn (dust and smog) and the dirt that deposits on the fabric from washing and drying (fine fiber dust) gets wedged inside these spaces graying the fabric and making cleaning very difficult. If the fabric is a synthetic microfiber (such as nylon and polyester) this problem is accentuated since the dirt is attracted inside the fibers because of the electrostatic charge.

QUESTIONS RECEIVED THIS MONTH – Why do tumble dryer marks remain on garments? – Down composition and quality and its relation to defects after washing. – What is inkjet or digital printing and what problems can it give? – Why do curtains often shrink after wet cleaning? – Problems when washing microfiber fabrics.

Detergo Magazine – October 2013

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