To evaluate supplied products for bathroom cleaning from three substrates.
Date Run:
07/26/2005
Experiment Procedure:
Two supplied cleaning product were diluted to vendor recommended concentration for bathroom cleaning (2.5%). The product was diluted with DI water. Six preweighed fiberglass, six ceramic and six 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 Professional Painter's Rag 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). At the end of the cleaning, coupons were wiped once with a dry paper towel. Final weights were recorded. Efficiencies were calculated and recorded.
Trial Results:
The cleaning solutions had little difficulty with SSL Soil 1 on all three substrates. The table below lists the amount of soil added, removed and the efficiency for each coupon cleaned.
Table 1. Soil Removal
Cleaner
Substrate
Initial wt
Final wt
% Removed
DFC 23
Fiberglass
0.2805
0.0029
98.97
0.1754
0.0031
98.23
0.2931
0.0059
97.99
DFC 30
0.2579
0.0024
99.07
0.3653
0.0018
99.51
0.1317
0.0004
99.70
DFC 23
Chrome
0.1536
0.0048
96.88
0.1522
0.0029
98.09
0.2429
0.0023
99.05
DFC 30
0.2280
0.0041
98.20
0.2379
0.0062
97.39
0.2330
0.0059
97.47
DFC 23
Ceramic
0.1603
0.0037
97.69
0.0899
0.0002
99.78
0.2272
0.0016
99.30
DFC 30
0.2782
0.0016
99.42
0.2375
0.0012
99.49
0.2064
0.0011
99.47
Success Rating:
A follow up test, usually based on company input.
Conclusion:
The overall efficiency for DFC 23 and DFC 30 were both over 98%, passing the cut off of 85% established for the Massachusetts EPP janitorial cleaning evaluations.
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