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How Does Starch Affect Shirts?

    Home Blog How Does Starch Affect Shirts?
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    How Does Starch Affect Shirts?

    By admin | Blog | Comments are Closed | 5 February, 2020 | 1

    We have identified a few technical perspectives between the durability / longevity of your dress shirt in relation to the level of starch it receives. Have you ever witnessed a shirt that begins to break down or wear thin in areas of abrasion? Common sightings are elbows, forearms, cuffs, and collars. Basic knowledge tells us that areas of fabric that continuously rub another surface, such as your forearm/elbow area on your desk, wear down the fabric quicker, but now it is clear that your starch preference plays a role in this.

    Starch and sizings are laundry additives that can increase the firmness of fabrics, particularly dress shirts. A study conducted by the Drycleaning & Laundry Institute, the Association of Professional Drycleaners showed starch and sizings can both protect and harm shirts at the same time.

    Shirts undergo two types of abrasions. One type is called flat abrasion, and it refers to the abrasion that occurs when the shirt rubs against any other surface. The other type, flex abrasion, refers to the stretching of the fibers when the wearer bends an elbow, or otherwise stretches the material.

    Starch adds protection to shirts, enabling them to withstand higher degrees of flat abrasion. However, since starch stiffens the fibers and makes them less flexible, it reduces the degree of flex abrasion a shirt can withstand.

    Tensile strength is the measure of how well fabrics and fibers resist breaking under tension. Evaluation by DLI‘s Textile Testing laboratory found that shirts with medium starch and no starch had similar tensile strength. Variances in tensile strength were evident between shirts with no starch and shirts with heavy starch.

    After 10 laundering cycles, the tensile strength results on the shirts with no starch was 29% higher than the results on the shirts with heavy starch. Even after 25 and 50 cycles, there was still about a 20% difference between the two groups of shirts.

    Heavy starch and sizing can decrease the tensile strength of fabrics not by degrading the material directly, but by increasing its rigidity.

    The major function of starch is to add body or stiffness to a fabric which in turn will produce little flexibility. This lack of flexibility causes the fabric to snap when tested rather than stretch, which decreases the fabric’s tensile strength. Starched and sized shirts were laundered to remove the starch and tensile strength was retested. The results indicated a significant increase (30%) in tensile strength after starch removal.

    The life expectancy of a shirt is shortened by the use of starches and sizings by reducing its ability to bend, stretch, and straighten during use, according to the DLI study. Balancing out those negatives are the bonuses of having better whiteness retention, a crisper look, and increased resistance to staining.

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    • Free Delivery – Schedule Order
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      • Residential Service
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      • Clothing Restoration – Water, Mold, Smoke, and Fire Remediation
    • Prices
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