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Browning can be caused by many factors. Sometimes it can be removed; sometimes not. Learn the proper way of dealing with this concern to succeed very well. Browning is the oxidation of a sugar called lignin. This dissolves in water or cleaning solutions and wicks to the surface during drying. Alkalinity will greatly accelerate cellulosic browning. Over-wetting, slow drying and the age of the fabric also increase the likelihood and severity of browning Clean and Not Damage Be aware of the fiber(s) you are dealing with. Jute backed carpets make up only a small percentage of the carpets you will clean. Woven carpet and area rugs are likely to have cotton foundation yarns. Cellulosic fibers are more common in upholstery fabrics. If uncertain of the fiber content, do a burn test and check technical aspect. Use a neutral or acid side carpet cleaner if it will provide sufficient cleaning ability. If you use an alkaline cleaning agent, neutralize by rinsing with an acid side product. Dilute Citric Acid at 8-10 tablespoons per gallon of hot water. Using a pump-up sprayer (or trigger sprayer for small areas), lightly mist the Citric Acid solution. Do this as lightly as possible. Once the area is dry, vacuum it aggressively. Citric Acid dries like fine sand and can be troublesome to vacuum. Warning: Always test materials for colorfastness, follow label directions, and never mix products unless specified in the label directions. Each situation reacts differently and results may vary. In severe cases of browning it may be necessary to lightly re-clean the entire area in order to loosen the oxidized sugars.Remember, moisture and alkalinity caused this problem. Use a neutral carpet cleaner and be careful to control the moisture. HELPFUL HINTS Using the prevention methods above for all of your cleaning situations will greatly reduce your callbacks. These methods help prevent browning, yellowing, soil wicking, bleeding, etc., Recent advances in encapsulation chemistry are showing promise in helping to control and correct cellulosic browning.If you decide to clean using hot water extraction, a post cleaning spray application of Encapuguard resists wicking of lignin to the surface. Carpets and carpet backings were not as good then either. Equipment now does a better job of leaving the carpet dry. Most carpet cleaning professionals are now better trained and most (but not all) know better than to over wet a carpet or to use overly strong detergent solutions. Also, the mills less commonly use jute backing. Refer to pros if you feel you cannot do it on your own Check Out Auckland Carpet Cleaning for a reliable assistance to better protect your item
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