The three products were used at full strength as recommended.
Preweighed porcelain, painted steel and plastic coupons were coated with DCC-17 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 Kimberly-Clark Wypal reinforced paper towel was attached to the cleaning sled and soaked with 2-3 sprays of cleaning solutions. Each coupon was sprayed 1-2 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.
ChemistriesEvaluated: Cleaner: 1. Common Good & Company All Purpose Cleaner; 2. 7th Generation ALL Purpose; 3. Formula 409
All three products were NOT effective at removing the PCC-17 from the three surfaces using manual wiping. The Product 3 resulted in the lowest efficiency, removing just over 78% of the DCC-17. The table lists the amount of soil added, the amount remaining after cleaning and the calculated efficiency for each coupon cleaned.
A- Porcelain; B- Painted steel; C-Plastic
| Cleaner
|
Sub
|
Initial
|
Final
|
%Removed
|
Ave % Removed
|
| 1
|
A
|
0.0271
|
0.0050
|
80.44
|
77.55
|
| 1
|
A
|
0.0514
|
0.0065
|
87.35
|
|
| 1
|
A
|
0.0330
|
0.0116
|
64.85
|
|
| 1
|
B
|
0.0526
|
0.0041
|
92.21
|
91.76
|
| 1
|
B
|
0.0428
|
0.0041
|
90.42
|
|
| 1
|
B
|
0.0545
|
0.0040
|
92.66
|
|
| 1
|
C
|
0.0454
|
0.0087
|
80.84
|
76.52
|
| 1
|
C
|
0.0725
|
0.0169
|
76.69
|
|
| 1
|
C
|
0.0311
|
0.0087
|
72.03
|
|
| 2
|
A
|
0.0500
|
0.0092
|
81.60
|
64.38
|
| 2
|
A
|
0.0239
|
0.0109
|
54.39
|
|
| 2
|
A
|
0.0217
|
0.0093
|
57.14
|
|
| 2
|
B
|
0.0490
|
0.0024
|
95.10
|
94.60
|
| 2
|
B
|
0.0297
|
0.0017
|
94.28
|
|
| 2
|
B
|
0.0340
|
0.0019
|
94.41
|
|
| 2
|
C
|
0.0118
|
0.0026
|
77.97
|
76.68
|
| 2
|
C
|
0.0305
|
0.0115
|
62.30
|
|
| 2
|
C
|
0.0382
|
0.0039
|
89.79
|
|
| 3
|
A
|
0.0528
|
0.0084
|
84.09
|
73.00
|
| 3
|
A
|
0.0618
|
0.0232
|
62.46
|
|
| 3
|
A
|
0.0345
|
0.0095
|
72.46
|
|
| 3
|
B
|
0.0288
|
0.0026
|
90.97
|
93.05
|
| 3
|
B
|
0.0426
|
0.0025
|
94.13
|
|
| 3
|
B
|
0.0420
|
0.0025
|
94.05
|
|
| 3
|
C
|
0.0319
|
0.0009
|
97.18
|
84.44
|
| 3
|
C
|
0.0163
|
0.0070
|
57.06
|
|
| 3
|
C
|
0.0220
|
0.0002
|
99.09
|
|