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“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 THE QUESTIONS RECEIVED
Does a label on a wedding gown that reads 50% silk/50% other fibers make any sense?
According to both the old Italian law and the new EU regulation 1007/2011, the claim “other fibers”(art. 9 par. 2) can only be used for those blend components weighing less than 5% or for fibers that combined weigh up to 15% of the total weight of the textile product and if they cannot be easily identified at the time of the manufacture. The label is therefore incorrect. The claim “other fibers” can also be used for the fibers not listed in attachment 1 of the legislative decree (only 49 fibers). For textile products the composition of which is hard to state at the time of their manufacture (art. 9 par. 4), the term ‘mixed fibres’ or the term ‘unspecified textile composition’ may be used on the label or marking.

How does a flatwork ironer work?
A flatwork ironer is a machine that uses pressure and traction between the roller and the heated chest. With a flatwork ironer, the linen is ironed by way of pressure – roller- chest -heat and feeding of the linen through the roller traction. Flatwork ironers are designed to iron flatwork and manufacturers have a wide range of machines that meet any needs, depending on production capacity requirements: – For small production runs, electrical heating is used with rollers from 1200 to 2600 cm in length and 20 to 40 cm in diameter. It is important to choose the right machine (manufacturer). The most critical aspect of the machine is the uniform distribution of heat in the chest. Heat is provided through electrical resistances that must be carefully designed. Equally important is the positioning of the thermostat-controlled heat probe. The machine is equipped with pedal-operated servo motors to move the roller away from the chest and to ensure operator’s safety. – For medium production runs, the chest is gas-heated using a burner positioned in the chest area. Again, the most critical factor is the quantity of calories supplied to the thermostat-controlled chest. – For large production runs, steam-powered. single or multi-roller ironers are used with feeders followed by folders and piece counters. The steam pressure determines the quantity of heat provided.

Special spotting treatments
Mr. Giorgio Grasselli, owner of 3Più laundry, answers this question. Stain spotting always causes major hassles to textile care operators. Not all stains are created equal, but nevertheless they can be removed by following a few rules. All stains are formed by easily recognizable elements. They can normally be categorized in two types: * greasy stains * non-greasy stains Non-greasy stains can be caused by pigments, proteins, tannins, or be of the inert type. Non-greasy stains are the most difficult to interpret. * Pigment-based: mud, water, rainwater, soot, water-based paints, rust, inks, yellow stains and molds. They can be removed using water and alkaline soap; if metals and oxides (rust) are present, acidify. Only neutral soap should be used for wool and silk. If metals are present, acidify using lemon juice and salt or oxalic acid. For yellow stains and molds, dab with diluted hydrogen peroxide. Only if color fastness allows it, use sodium hypochlorite followed by acid neutralization and rinsing. * Protein-based stains: blood, urine, milk, egg, sweat. Soak in cold water to remove soluble proteins. If grease stains remain, use solvent, whereas if yellow stains remain, dab with hydrogen peroxide. * Tannin-based stains: coffee, grass, tea, fruit and chocolate. Always use neutral soap as soap with a high pH will increase the coloring effect. Dab using hydrogen peroxide (10 vol). * Inert stains: rinse with running water. Greasy stains caused by: sludge, wax, natural resins, vegetable and mineral oils, lipstick, tar. They can be removed using solvents. If compatible with the fabrics, use nail polish remover or paint thinners with glycerin and then shampoos such as those used to wash cars (they contain ethoxylates and/or surface active agents which break down the grease). Chewing gum (when the fabric cannot be washed) can be easily removed using para rubber. First slightly heat the rubber with a hair dryer and then delicately rub the fabric.

How can you determine the quality of the washing detergent before conducting the specific washing tests to evaluate its performance?
Mr. Giorgio Grasselli, owner of the 3Più laundry, answers this question. Unfortunately it is difficult to describe the tactile experience, however, I’d like to give a few broad indications. Dilute the washing detergent which should have limited pH (max 10) on the palm of your hand with a little bit of water. It should remove easily and the feeling of smoothness should disappear with a little bit of water; it must have a light specific weight and be readily soluble in water without forming hard grains (calcium carbonate, marble powder).

Why do wool garments sometimes felt?
Excessive humidity in the solvent or in the garments to clean causes the flakes to open and get twisted as a result of mechanical agitation. This causes matting or felting and this process is irreversible. Only if the dry cleaning machine is dry, cleaning will not cause the flakes to open and the garment will not felt.

QUESTIONS RECEIVED THAT WILL BE PUBLISHED IN THE NEXT ISSUE
– How to check for the presence of water in the machine and what is the potential damage?
– Why does washing cause pilling on cotton garments?
– Why do white microfiber garments become gray and difficult to wash?
– Why do leather garments shrink?

Questo post è disponibile anche in: Italian

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