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Trial Number 1

Trial Purpose:

To evaluate the effectiveness of Better Life laundry detergent and a comparative product in removing soils from white cotton, purple nylon and orange polyester.

Date Run:

07/26/2019

Experiment Procedure:

Nine 4”x 5” swatches per cleaner, three of each fabric type, were contaminated with motor oil, ink, dirt, and mustard and air dried for 24 hours. Fabrics were washed at 88˚F for 12 minutes per cleaner. Fabrics were placed in a five minute spin cycle and a nine minute rinse cycle before drying for 24 hours. A colorimeter was used to take initial, contaminated, and clean measurement values.

SRI = 100 – ((Lc-Lw)2 + (ac-aw)2 + (bc-bw)2)1/2

Where:

L = reflectance

A = redness/greenness

B = yellow/blueness

C = unstained fabric, washed in the treatment conditions

W = stained fabric, washed in the treatment conditions

Trial Results:

Table 1: Results from Cleaner 1

Cleaner Fabric Soil SRI Average
1 White Cotton Oil 76.630 72.84
Ink 54.8
Dirt 77.72
Mustard 82.22
Purple Nylon Oil 93.7 72.48
Ink 80.94
Dirt 23.13
Mustard 92.14
Orange Polyester Oil 90.3 66.65
Ink 55.77
Dirt 22.39
Mustard 98.12

Table 2: Results from Cleaner 2

2 White Cotton Oil 82.64 75.12
Ink 57.92
Dirt 81.45
Mustard 78.47
Purple Nylon Oil 93.79 77.19
Ink 80.74
Dirt 40.62
Mustard 93.62
Orange Polyester Oil 87.98 84.79
Ink 56.69
Dirt 96.37
Mustard 98.11

Table 3: Cleaner 1 L, a, and b values. % Difference is included

  Initial Clean % Difference
  L A B L A B L A B
White Cotton 85.59 -1.23 7.29 63.02 0.82 12.49 26.38 166.76 -71.25
85.55 -1.16 7.32 41.75 0.89 -3.64 51.20 176.79 149.70
85.77 -1.20 7.35 63.54 0.00 6.67 25.92 99.72 9.25
85.53 -1.18 7.50 82.85 -2.42 25.01 3.13 -104.80 -233.47
Purple Nylon 30.00 17.04 -35.60 26.50 16.28 -30.42 11.65 4.46 14.55
30.07 16.84 -35.36 26.63 8.16 -18.75 11.44 51.56 46.98
30.34 26.42 -35.67 29.51 15.50 -33.79 2.75 41.35 5.27
30.27 16.83 -35.58 29.37 12.14 -29.34 2.98 27.88 17.54
Orange Polyester 66.76 26.39 42.40 58.08 30.65 42.36 13.00 -16.14 0.10
66.75 66.75 42.72 39.23 7.55 13.68 41.22 88.69 67.97
66.66 66.66 42.29 64.53 25.76 41.48 3.19 61.36 1.92
66.91 66.91 42.14 66.88 27.81 43.18 0.05 58.43 -2.48

Table 4: Cleaner 2 L, a, and b values. % Difference is included

  Initial Clean % Difference
  L A B L A B L A B
White Cotton 85.80 -1.36 7.45 69.54 0.48 13.11 18.95 135.14 -75.94
86.04 -1.26 7.46 44.31 0.89 -3.36 48.51 170.63 145.11
87.15 -0.97 3.95 68.64 -0.03 4.44 21.24 96.90 -12.41
88.41 -0.96 1.58 85.44 -3.35 22.75 3.36 -248.10 -1337.05
Purple Nylon 30.05 16.86 -35.48 26.71 15.94 -30.34 11.13 5.44 14.48
30.28 16.86 -35.59 26.84 8.07 -18.81 11.37 52.14 47.16
30.15 16.84 -35.39 29.07 15.56 -33.89 3.58 7.60 4.25
29.85 16.74 -35.22 28.94 12.88 -30.24 3.05 23.06 14.15
Orange Polyester 66.80 26.23 42.11 55.91 31.24 42.06 16.31 -19.10 0.11
66.92 26.29 42.13 39.49 8.37 13.81 40.98 68.17 67.23
66.56 26.32 41.90 63.62 25.62 39.92 4.43 2.65 4.73
66.95 26.51 42.53 65.94 27.91 42.98 1.51 -5.29 -1.06

Table 5: Average percent change in fabric color

  % Change
Better Life Detergent L a b
White Cotton 26.65 84.62 -36.44
Purple Nylon 7.20 31.31 21.09
Orange Polyester 14.37 48.09 16.88
7th Generation Detergent L a b
White Cotton 23.02 38.64 -320.07
Purple Nylon 7.28 22.06 20.01
Orange Polyester 15.81 11.60 17.75

Success Rating:

Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.

Conclusion:

Seventh Generation Laundry Detergent was slightly more effective at removing stains than Better Life Laundry Detergent. Neither were considered overall effective at removing the stains from the fabrics.

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