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 Dust Sebum Soil Cloth

 

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Scientific Services continues to supply the Detergent Industry with storage stable soiled fabrics prepared by the Spangler Procedure1.  Dust Sebum soil is widely used for detergency testing because it simulates the most common, and one of the most troublesome, soils found in home laundry: Ring Around-the-Collar.  Literally, Ring Around-the-Collar is sebum from the skin mixed with dust from the air rubbed into the neckband.  The same dust sebum soil is found on all clothing and linens.  An Emulsion of synthetic sebum containing a dispersion of dust (air conditioner filter dust/dirt) is padded onto strips of fabric.  The strips are air dried and aged overnight and cut into swatches.  Oxidative stability has been achieved by packaging all swatches in glass under nitrogen; also by a proprietary pre-treatment of the sebum.

Our original work showed that our dust sebum soiled cloth packaged under nitrogen was unaffected by storage for 15 months at ambient laboratory conditions.  Cloth in opened packages can be re-flushed with inert gas and resealed to prevent oxidation.  Storage in a refrigerator is not recommended since air may be sucked into bottles and cause deterioration.  Light will fade the soil, so, exposure to strong actinic light should be avoided.  If light and air are excluded, soiled swatches may be stored for six months or longer without deterioration (Check out the Storage & Stability page for a complete list).  A single lot should be used for any one study since changes in soil, fabric, etc. will cause quantitative variations in soil removal.  Ranking order usually will not change.

We maintain an inventory of dust sebum on the three most popular fabrics and there is no minimum order.  The standard package is as follows:

Swatch Size 3" x 4" with pinked or fused edges
Swatches per Package 24
Stock Fabric Cotton #400 Print Cloth, Cotton Polyester Durable Press 7435 WRL, Polyester #777

We are happy to soil almost any of the numerous fabrics in the Testfabrics, Inc. and Textile Innovators Corp. catalogs.  There is a minimum order requirement of ten (10) packages; check to see because we keep odd lots of many soils and stains on various fabrics.  However, we will soil fabrics which our clients submit in 4" x 72" strips; we can also apply the dust sebum to certain garments for washing machine tests.

 

1 - Spangler, W.G. et al, J Am Oil Chem Soc. 42 723 (1965)

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Last modified: 03/30/07
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