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Trial Number 4

Trial Purpose:

To retest Do-it-Yourself formulations for bathroom cleaning.

Date Run:

05/01/2008

Experiment Procedure:

The supplied cleaning products were used at the recommended concentration. Two products were included for comparison and used at its ready to use concentration.

Preweighed ceramic, plastic and steel coupons were coated with Hucker's Soil Formulation (Jif Creamy Peanut Butter 9.2%, Salted Butter 9.2%, Arrowhead Mills stone ground wheat flour 9.2%, Egg Yolk 9.2%, Evaporated milk 13.8%, Distilled water 45.8%, Printer's ink with boiled linseed oil 0.9%, Shaws saline solution 2.7%) using a hand held swab and allowed to dry for 24 hours at room temperature. The contaminated coupons were weighed again to determine the amount of soil added.

Three coupons were placed into a Gardner Straight Line Washability unit. AA Wypall X60 reinforced wipe was attached to the cleaning sled and soaked with 5-7 sprays of cleaning solutions. Each coupon was sprayed 7-10 times with the same cleaning solution. The solution was allowed to penetrate for 30 seconds followed by cleaning in the SLW unit for 20 cycles (~33 seconds). Coupons were blotted dry with a clean Wypal wiper. Final weights were recorded and efficiencies were calculated and recorded.

Trial Results:

Three of the four products were effective during the retesting of the all purpose cleaning soil, all removing over 92% of the soil.

Cleaner Initial wt Final wt % Removed
Steel 0.1893 0.0024 98.73
  0.0973 0.0020 97.94
  0.2806 0.0034 98.79
Plastic 0.2608 0.0023 99.12
  0.0952 0.0013 98.63
  0.1757 0.0041 97.67
Ceramic 0.2145 0.0017 99.21
  0.1026 0.0025 97.56
  0.0651 0.0112 82.80
Steel 0.2177 0.0163 92.51
  0.2784 0.0078 97.20
  0.2608 0.0154 94.10
Plastic 0.0636 0.0108 83.02
  0.1117 0.0058 94.81
  0.1187 0.0041 96.55
Ceramic 0.1269 0.0016 98.74
  0.2035 0.0037 98.18
  0.1337 0.0299 77.64
Steel 0.2655 0.0052 98.04
  0.2762 0.0287 89.61
  0.1722 0.0041 97.62
Plastic 0.1236 0.0044 96.44
  0.1138 0.0083 92.71
  0.1767 0.0103 94.17
Ceramic 0.2307 0.0028 98.79
  0.1105 0.0032 97.10
  0.0544 0.0019 96.51
Steel 0.1696 0.1120 33.96
  0.1564 0.2068 -32.23
  0.2224 0.2314 -4.05
Plastic 0.1265 0.0585 53.75
  0.1150 0.0478 58.43
  0.0820 0.0398 51.46
Ceramic 0.1133 0.0436 61.52
  0.2207 0.0960 56.50
  0.0403 0.0210 47.89

Success Rating:

A follow up test, usually based on company input.

Conclusion:

Three products had overall average efficiencies over 85% and would be considered effective based on the SSL testing methodology.

The original results in the previous trial may have been due to base weights being incorrect prior to soiling. Results from this trial more closely matched visual observations.

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