To test the efficacy of one lower cost reformulation of the Chemtrax liquid laundry detergent containing the 4% enzyme mix identified from previous testing.
Date Run:
07/15/2025
Experiment Procedure:
Prep: 5x5 inch white cotton and blue polyester fabric swatches were used for testing. Each fabric swatch was measured for reflectance with a colorimeter 5 times in 3 separate areas (0.5x0.5) where the fabric would eventually be stained. The three areas were treated as individual coupons. The 5 measurements for each area were averaged together and used as the representative measurements of the specified area/coupon. Each area was stained with the correct soil type and left to air dry for 24 hours. Colorimeter measurements of each stain were then recorded.
Washing procedure: The fabric swatches were washed in a top loader washing machine with 45 mL of Liquid Laundry Detergent and 6.5 gallons of water on a normal washing cycle set for a medium load. The water used has a water hardness level of 63 PPM mg/L. The washing cycle consisted of a wash step (~12 mins), a rinse step (~14 mins), and a spin step (~5 mins). Half of the fabric swatches were washed unheated with a temperature range of 60F-85F, while the other half was washed heated with a temperature range of 105F-125F. The fabric swatches were dried in the drying machine on a heated gentle/tumble setting for 30 mins. After drying, the colorimeter was used to re measure the 3 staining areas on each fabric swatch.
Analysis:
Detergency: Unadjusted measure of the percentage the cleaned fabric was returned to its original state (uses only L values/measures of lightness)
The table below compare the measurements of the MS LLD baseline product tested, and the measurements of the reformulations.
Reformulation 1:
Cold Water
Hot Water
Artificial Stain
Stain Removal Index acceptable range
MS LLD Original
Reformulation 1
Pass/Fail
MS LLD Original
Reformulation 1
Pass/Fail
Dust & Sebum on Cotton
SRI within 10 points
97.75
98.83
Pass
93.81
95.2
Pass
Dust & Sebum on Polyester
SRI within 10 points
94.36
94.66
Pass
83.1
74.87
Pass
Clay on Cotton
SRI within 11 points
98.28
99.88
Pass
99.04
99.82
Pass
Clay on Polyester
SRI within 5 points
96.02
95.4
Pass
99.61
101.25
Pass
EMPA 112- Cocoa on Cotton
SRI within 9 points
99.78
98.85
Pass
99.22
98.82
Pass
EMPA 116- Blood, Milk & Ink on Cotton
SRI within 2.5 points
97.05
97.15
Pass
97.7
98.13
Pass
Grass on Cotton
SRI within 2 points
96.56
99.92
Pass
94.16
92.79
Pass
Grass on Polyester
SRI within 2 points
100
98.95
Pass
95.48
98.37
Pass
Success Rating:
Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
Conclusion:
Reformulation 1 was able to pass the comparison criteria across all stains, fabric types, and temperatures.
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