Pre-weighed ceramic, porcelain coupons were coated with Hucker's Soil Formulation (Jiffy creamy peanut butter, salted butter, Arrowhead Mills stone ground wheat flour, egg yolk, evaporated milk, distilled water, printer's ink with boiled linseed oil, Shaws saline solution) 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 Wypal 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 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.
The supplied Purac cleaner removed 85% of the Hucker’s soil on ceramic coupon but only 81% from the porcelain. The table lists the amount of soil added, the amount remaining after cleaning and the calculated efficiency for each of the ceramic and porcelain coupons cleaned.
| Cleaner
|
|
|
|
|
|
| Purac Toilet Cleaner
|
Ceramic
|
Initial wt
|
Final wt
|
% Removed
|
Overall Ave
|
|
|
|
0.2699
|
0.0198
|
92.66
|
85.50
|
|
|
|
0.0715
|
0.0094
|
86.85
|
|
|
|
|
0.1534
|
0.0353
|
76.99
|
|
|
|
|
|
|
|
|
|
|
Porcelain
|
0.0922
|
0.0060
|
93.49
|
81.59
|
|
|
|
0.0606
|
0.0117
|
80.68
|
|
|
|
|
0.0435
|
0.0128
|
70.57
|
|
|
|
|
|
|
|
|
| Comet Bathroom Cleaner
|
Ceramic
|
0.1510
|
0.0244
|
83.84
|
87.19
|
|
|
|
0.1497
|
0.0119
|
92.05
|
|
|
|
|
0.1249
|
0.0179
|
85.67
|
|
|
|
|
|
|
|
|
|
|
Porcelain
|
0.0634
|
0.0104
|
83.60
|
84.48
|
|
|
|
0.0915
|
0.0069
|
92.46
|
|
|
|
|
0.0274
|
0.0062
|
77.37
|
|
The supplied Purac product removed more than 80% removal of the Hucker’s soil from both surfaces. In addition, the Lewis and Harrison Toilet Cleaner was as effective as the conventional cleaner, Comet Bathroom cleaner. Hard water stain removal evaluation can be conducted following the marble block test upon determining effective toilet bowl cleaning.