The selected products were diluted to 5% using DI water in 250 ml beakers and heated to 130 F on a hot plate.
The contaminant again consisted of two components from RPM Wood Finishes Group. The first, MS2664 Catalyst White (108-10-1, 28182-81-2, 822-06-0) was used at three parts. The second, MS2669 Primer (108-10-1, 28182-81-2, 822-06-0) was used at one part. The mixed paint/primer was applied to eighteen preweighed steel coupons and allowed to dry. A second weight was recorded to determine the amount of paint applied.
Three painted coupons were immersed in a cleaning product and cleaned for 10 minutes using a 40 kHz ultrasonic tank. After the cleaning, coupons were rinsed in a tap water bath for 15 seconds at 120 F and air dried for 30 seconds at room temperature. The coupons were then rubbed with a gloved hand to determine how easily the paint could be removed. Once dry, the coupons were weighed a final time and removal efficiencies were calculated.
Three of the alternatives resulted in efficiencies over 90% when ultrasonics and wiping were used. Two other products removed over 80% of the paint. One product removed less than 60%. The table below lists the amount of paint applied, the amount remaining and the efficiency for each coupon cleaned.
| Cleaner
|
Initial wt
|
Final wt
|
% Removed
|
| Solsafe 245
|
0.0698
|
0.0010
|
98.57
|
|
|
0.0319
|
0.0083
|
73.98
|
|
|
0.0386
|
0.0094
|
75.65
|
| Aquavantage 3800 GD
|
0.0339
|
0.0031
|
90.86
|
|
|
0.0560
|
0.0207
|
63.04
|
|
|
0.0673
|
0.0040
|
94.06
|
| Shopmaster
|
0.0423
|
0.0225
|
46.81
|
|
|
0.0762
|
0.0194
|
74.54
|
|
|
0.0560
|
0.0245
|
56.25
|
| Inproclean 4000 T
|
0.0436
|
0.0048
|
88.99
|
|
|
0.0632
|
0.0004
|
99.37
|
|
|
0.0383
|
0.0001
|
99.74
|
| Beyond 2006
|
0.0400
|
0.0007
|
98.25
|
|
|
0.0744
|
0.0032
|
95.70
|
|
|
0.0781
|
0.0021
|
97.31
|
| A 2000 XS
|
0.0607
|
0.0004
|
99.34
|
|
|
0.0371
|
0.0033
|
91.11
|
|
|
0.0485
|
0.0009
|
98.14
|
| Surface Cleanse 930
|
0.0473
|
0.0038
|
91.97
|
|
|
0.0474
|
0.0039
|
91.77
|
|
|
0.0598
|
0.0078
|
86.96
|