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 handheld 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 formulations 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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