Yellowing/browning can be caused by many factors. Sometimes it can be removed; sometimes not. Never guarantee complete removal.
The most common factors that cause yellowing are:
The Solution: Basic Method – Cellulosic Browning:
Basic Method – BHT:
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.
Chemspec Browning Treatment removes or reduces browning caused by coffee, tea, and over-wetting, and bleed through of jute backing. Effective for carpet but can be used safely on upholstery, too!
Target is ideal for removing alkalines and tannin stains, such as coffee, tea, urine, perfume, and others. This acid-side spotter can also be used for correcting browning, dye reversal, and setting fugitive dyes. It is also excellent for removing ice melt residue.
Oxidizer is a powdered version of hydrogen peroxide—essentially a safe form of bleach—that is specially formulated as an additive booster to make your traffic lane cleaner or extraction detergent work even better. It’s ideal for use on stubborn stains, like nicotine stains, or browning on carpet, upholstery, and hard surfaces.
Prochem Yellow Rx removes yellowing and brown discolorations on nylon, olefin, and many natural fiber carpets, as well as wet-cleanable upholstery.