The supplied cleaning products were used at the recommended concentrations (6.5%). Preweighed ceramic, painted steel and plastic coupons were coated with Hucker's Soil Formulation (Jif Creamy Peanut Butter 8.8%, Salted Butter 8.8%, Arrowhead Mills stone ground wheat flour 8.8%, Egg Yolk 8.8%, Evaporated milk 13.3%, Distilled water 44.2%, Printer's ink with boiled linseed oil 0.9%, Shaws saline solution 2.7%, India Ink 3.7%) 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 Kimberly Clark Reinforced paper towel 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). At the end of the cleaning, coupons were wiped once with a dry paper towel. Final weights were recorded and efficiencies were calculated and recorded.
Visually there was streaking and staining across the board by all cleaners on all substrates. The appearance left the impression that the effectiveness of the client provided cleaner was more effective than the comparative product. This was supported by the data provided by the stainless-steel coupon sets which showed that the client provided cleaner achieved the same level of effectiveness as the comparative product.
| Cleaner
|
Initial wt
|
Final wt
|
% Removed
|
OveralLl Ave
|
| Smoke-Solv- Painted Steel
|
|
|
|
|
|
|
0.0326
|
0.0003
|
99.08
|
99.20
|
|
|
0.0326
|
-0.0001
|
100.31
|
|
|
|
0.0240
|
0.0004
|
98.33
|
|
| Bix TSP- Painted Steel
|
|
|
|
|
|
|
0.0417
|
0.0010
|
97.60
|
96.20
|
|
|
0.0432
|
0.0019
|
95.60
|
|
|
|
0.0420
|
0.0019
|
95.48
|
|