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Trial Number 3

Trial Purpose:

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

Date Run:

05/01/2008

Experiment Procedure:

The two supplied cleaning product was diluted to vendor recommended concentrations for bathroom cleaning. Two other household products were included for comparative purposes. Preweighed fiberglass, ceramic and chrome coupons were coated with SSL Soil 1 (Bathroom soap scum: Vaseline Dry Skin Lotion 21.4%, Dial Clean Rinsing Body Wash 14.3%, Market Basket Shampoo & Conditioner (Pert)28.6%, Soft Soap Natural Liquid hand soap 21.4%, Coast Deodorant bar soap 7.2% and Water 7.1%) 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. A Wypal reinforced wiper 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 cleaning unit was run for 20 cycles (~33 seconds). Coupons were blotted dry with a clean Wypal wiper. Final weights were recorded, efficiencies were calculated and recorded.

Trial Results:

One of the DIY formulation and one of the other products removed over 90% of the bathroom soil. The second DIY formulation had little success following the established protocols. Additional rinsing or longer cleaning times may result in improved efficiency. The table lists the amount of soil added, the amount remaining and the efficiency for each coupon cleaned.

Cleaner Initial wt Final wt % Removed
Fiberglass 0.2958 0.0125 95.77
  0.1459 0.0014 99.04
  0.2725 0.0097 96.44
Ceramic 0.1962 0.0542 72.38
  0.1609 0.1089 32.32
  0.1728 0.0532 69.21
Chrome 0.1080 0.0055 94.91
  0.1437 0.0073 94.92
  0.1437 0.0116 91.93
Fiberglass 0.2458 0.0030 98.78
  0.2516 0.0020 99.21
  0.1366 0.0033 97.58
Ceramic 0.1580 0.0119 92.47
  0.1806 0.0297 83.55
  0.2447 0.0193 92.11
Chrome 0.1813 0.0126 93.05
  0.2483 0.0023 99.07
  0.1172 0.0063 94.62
Fiberglass 0.1681 0.0050 97.03
  0.1684 0.0049 97.09
  0.2021 0.0070 96.54
Ceramic 0.2492 0.0166 93.34
  0.1355 0.0146 89.23
  0.1884 0.0050 97.35
Chrome 0.2106 0.0196 90.69
  0.1661 0.0149 91.03
  0.1264 0.0139 89.00
Fiberglass 0.2006 0.1979 1.35
  0.3714 0.3523 5.14
  0.1343 0.1043 22.34
Ceramic 0.1151 0.0958 16.77
  0.0955 0.0537 43.77
  0.1312 0.0742 43.45
Chrome 0.1719 0.2027 -17.92
  0.1644 0.3503 -113.08
  0.1150 0.3320 -188.70

Success Rating:

A follow up test, usually based on company input.

Conclusion:

Two 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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