This Quick Guide highlights preventing browning when cleaning natural upholstery fabrics. The detailed methods covered in this Technical Bulletin apply to both carpet and upholstery.
Use a low moisture tool on upholstery.
Make extra drying strokes to remove as much moisture as possible.
Leave fibers in an acid condition by treating with Fab-Set during or after cleaning.
Dry quickly with air movers or an Air King. Direct air flow across fabrics, not into them.
Spray a mist of Fab-Set over the entire area. Wet only the surface. Do not saturate. Allow a few minutes dwell time.
Go over the surface with a Micro Fiber or Cotton Bonnet dampened with Fab-Set. Use a rotary machine on carpet. There are powered tools for bonnet cleaning on upholstery or this step can be done by hand with white cotton terry cloth. The idea is to clean the browning off the surface without rewetting the entire fiber and allowing browning to recur.
Dry quickly using air movers or an Air King.
In severe cases of browning it may be necessary to lightly re-clean the entire area in order to loosen the oxidized sugars. Then follow the correction steps listed above. Remember, moisture and alkalinity caused this problem. Use a neutral cleaner and be careful to control the moisture.
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., in addition to preparing the carpet for Bridgepoint's Maxim Protector.
Older cellulosic fibers (cotton, jute) will pose the highest risk and correction will be the most time consuming. Be sure to identify cellulosic fibers before you start. It is always easier and less costly to prevent problems before they occur.
Recent advances in encapsulation chemistry are showing promise in helping to control and correct cellulosic browning.
Encapsulation cleaning using Encapuclean or Encapuclean with Maxim uses limited moisture and a neutral pH and thus is less likely to trigger browning. Try encapsulation on a carpet that has potential to brown.
If you decide to clean using hot water extraction, a post cleaning spray application of Encapuguard resists wicking of lignin to the surface.
Encapuguard can also be used as a corrective measure. Apply a light mist after Step 2 above (or in mild cases instead of Step 2) prevents additional wicking and browning.