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Colors are defined by wavelengths. The visual spectrum ranges from approx. 400nm to 700 nm, in which violet is 400 nm, blue is around 475 nm, green is around 510 nm etc. With Rs-values, we actually measure the light-intensity at 460 nm. In other words: we actually measure the amount of a particular shade of blue. XYZ-values are actually a model for how the human eye and brain interpret color. We have 3 different types of receptors for color in our eye:
  • One is more sensitive to red
  • One is more sensitive to green
  • One is more sensitive to blue
Of these 3 receptors, the one sensitive to green is the most sensitive one (it determines most of our color-perception). The Y-value is the model value for the receptors that are more sensitive to green. So instead of measuring at a specific wavelength, it is a model of the color-perception by the human eye. The Y-value is actually a widely accepted way of measuring color.

We make a number of Sebum formulations. Since all the ingredients are usually quite similar we also make custom formulations for some customers.

Sebum Bey is a formulation started by a German scientist Dr. Bey in the 1960’s, it is the most used sebum formulation in the detergent industry

Sebum SASO is a formulation according to the SASO standard, mostly used as foam represent

Sebum Tefo is a formulation started by a (no longer existing) Scandinavian test institute, the recipe is now own by us. It is somewhat more complicated than the Bey formulation, for instance the addition of fatty alcohols, in practice this is usually more difficult to remove than Bey.

Sebum ASTM is a formulation according to the ASTM D4265.

Soil removal swatches are supplied in a vacuum sealed package and have an indefinite life if unopened and stored refridgerated.

The date of opening shall be marked on the packet and swatches shall be used within 12 months of that date. Unused swatches shall be resealed in the original packaging and stored refridgerated when not in use.

Ironing swatches that are used in wash tests has a number of advantages. The swatches will be dried immediately
without hanging them or drying time and the swatches are of course more smooth. This will give less variation in your
measurements.

Some of the stains are effected by this ironing after washing, especially due to the applied heat (therefore tumble drying is
also not a good idea for these swatches) this could affect the color of the stain.
The following stains are not suitable for ironing or tumble drying:

CodeSoil typeRemarks
C-S-01BloodAlso all other fabric substrates
C-S-16Lipstick PinkAlso all other fabric substrates
C-S-116Lipstick Pink, dilutedAlso all other fabric substrates
C-S-216Lipstick Red, dilutedAlso all other fabric substrates
C-S-20TomatoAlso all other fabric substrates
C-S-120Double Soiled TomatoAlso all other fabric substrates
C-S-24Red PepperAlso all other fabric substrates
C-S-26Corn StarchAlso all other fabric substrates
C-S-27Potato StarchAlso all other fabric substrates
C-S-28Rice StarchAlso all other fabric substrates
C-S-29Tapioca StarchAlso all other fabric substrates
C-S-126Corn Starch, agedAlso all other fabric substrates
C-S-127Potato Starch, agedAlso all other fabric substrates
C-S-128Rice Starch, agedAlso all other fabric substrates
C-S-129Tapioca Starch, agedAlso all other fabric substrates
C-S-226Double Soiled Corn StarchAlso all other fabric substrates
C-S-227Double Soiled Potato StarchAlso all other fabric substrates
C-S-228Double Soiled Rice StarchAlso all other fabric substrates
C-S-229Double Soiled Tapioca StarchAlso all other fabric substrates
C-S-34CurryAlso all other fabric substrates
C-S-57Red Beet PureAlso all other fabric substrates
C-S-59Asian Food StainAlso all other fabric substrates
C-S-60Spaghetti SauceAlso all other fabric substrates
C-S-75Blood with BeeffatAlso all other fabric substrates
C-S-77Babyfood Carrot PotatoAlso all other fabric substrates
C-S-77BBabyfood Strawberry BananaAlso all other fabric substrates
C-S-79Napolina TomatoAlso all other fabric substrates
C-S-85Double Applied Sheep BloodAlso all other fabric substrates
C-S-87Chili sauceAlso all other fabric substrates
C-S-87sChili sauce garlicAlso all other fabric substrates
C-S-89Hot Pot Also all other fabric substrates
C-S-89sHot Pot SatehAlso all other fabric substrates
C-S-101Blood, slightly aged.Also all other fabric substrates