The supplied cleaning product was diluted to vendor recommended concentration for glass cleaning (10%). The product was diluted with DI water.
Three preweighed chrome and three glass coupons were coated with SSL Soil 2 (Glass soap scum: Colgate Regular shaving cream 5.3%, Arid Extra Extra Spray Deodorant 3.5%, Suave Naturals Flexible Hold hair spray 3.7%, Aleeda Texturizing hair gel 25.6% Colgate Total toothpaste 10.4%, Water 51.5%) by pump spraying the mix. The soil was 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 5 cycles (~9 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 supplied product removed over 85% of the soil from the two substrates. The table below lists the amount of soil applied and removed from the coupons.
Cleaner
Initial wt
Final wt
% Removed
DFC Glass-Glass
0.0468
0.0006
98.72
0.0354
0.0003
99.15
0.0325
0.0009
97.23
Water-Glass
0.0611
0.0079
87.07
0.0774
0.0152
80.36
0.0621
0.0157
74.72
DFC Glass-Chrome
0.0798
0.0080
89.97
0.0644
0.0107
83.39
0.0609
0.0060
90.15
Water-Chrome
0.1372
0.0256
81.34
0.0868
0.0168
80.65
0.1462
0.0231
84.20
Success Rating:
A follow up test, usually based on company input.
Conclusion:
The overall efficiency of the DFC Glass cleaner was 93.10, passing the cut off of 85% established for the Massachusetts EPP janitorial cleaning evaluations.
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