To further evaluate selected cleaners for the removal of inks.
Date Run:
02/23/2000
Experiment Procedure:
Three cleaners were selected from the previous trial. The aqueous products was diluted with DI water to 20% in a 600 ml beaker. One of the semi-aqueous products was diluted to 50% and the other was used at full strength. Three sets of nine preweighed coupons were coated with one of the supplied inks and weighed again. Three coupons of each color were cleaned in each solution for five minutes with no agitation. After cleaning the coupons were rinsed for 15 second in tap water at 120F. After rinsing, each coupon was wiped twice using a fresh paper towel. Following the drying, final clean weights were recorded and efficiencies were calculated.
SUBSTRATE MATERIAL: Stainless Steel Coupons SS-302 B86
CONTAMINANTS: Inks-EMMCorp Thermosetting Inks of ER Series, Blue, Gold, Red CONTAMINATING PROCESS USED: Coupons were coated with inks using a hand held swab.
Trial Results:
SWR One was the only solution that had moderate removal of each of the three inks. During the cleaning, the color of SWR turned from its normal color of pink to which ever color it was attempting to clean (blue, gold, red). The other two solutions did not show the same dissolving action as SWR One. Inproclean had higher cleaning efficiencies than the Bio T Max. Table 2 lists the calculated results for each cleaner and ink colors.
Table 2. Cleaning Efficiencies
Cleaner
Inproclean 4000 T
Bio T Max
SWR One
Ink
Blue
Gold
Red
Blue
Gold
Red
Blue
Gold
Red
Coupon 1
48.03
15.22
54.84
50.22
29.69
54.15
51.43
62.61
84.86
Coupon 2
55.41
20.25
52.56
29.17
15.62
49.27
58.82
59.33
84.30
Coupon 3
73.21
14.44
60.64
51.96
10.14
47.91
60.86
75.18
78.35
Average
58.88
16.64
56.02
43.79
18.49
50.44
57.04
65.70
82.50
No visible signs of dissolving
No visible signs of dissolving
Dissolved inks easily
Success Rating:
A follow up test, usually based on company input.
Conclusion:
These three cleaners will be used once again for an additional experiment to imitate the cleaning procedure actually used for the removal of ink cleaning. Solutions will be used along with a more rigorous wipe cleaning.
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