Four coupons were contaminated with a single pass of ink and allowed to dry as in the previous two trials (7/8 -7/9). The main purpose of this trial was to determine a practical application usage of the two terpene cleaners. The customer supplied cleaner was compared to the terpene cleaners to determine the time needed to clean the ink from the substrate. The cleaners were applied to a paper towel as in the previous trials. When the cleaning started the clock was started. When the ink was completely removed from the coupon, the clock was stopped and the time was recorded. The coupons were then left for a period of three hours and weighed to determine the amount of ink left behind.
SUBSTRATE MATERIAL: Stainless Steel
CONTAMINANTS: Ink--Steel Blue DX-100 solvent based dye CONTAMINATING PROCESS USED: Single pass with ink on coupon, dried as before
Trial Results:
coupon #
Coupon
contaminated
contaminate
cleaned
remaining
% cont.
removal
comments
weight
coupon wt
weight
coupon wt
contaminate
remaining
time
13
63.2196
63.2241
0.0045
63.2179
-0.0017
-37.78
16sec
damage
14
63.224
63.2273
0.0033
63.2206
-0.0034
-103.03
8sec
damage
15
63.1253
63.1304
0.0051
63.1289
0.0036
70.59
13sec
16
62.9896
62.9944
0.0048
62.9878
-0.0018
-37.50
6sec
damage
cleaner ID
13
Safety Layout Blue Remover
14
Terpene Technology HTF-50
15
Terpene Technology HTF-60
16
T Square HTF-50
All of the cleaners appeared to remove the ink in under twenty seconds. According to the data, cleaner number 15 only removed about 30% of the cleaner. Yet upon visual inspection, there seemed to be no ink on the coupon. The other three cleaners damaged the coupons only slightly. This could be do to the before mentioned reason in trial 2 (accuracy of balance). Despite the minimal damage to the substrate, the cleaners worked well in the practical application of the ink to the coupons.
Success Rating:
A follow up test, usually based on company input.
Conclusion:
Upon completion of the three trials relating to the ink removal from the substrate, the lab suggests trying the two terpene cleaners in house and small samples of each chemistry were shipped to client, along with the MSDS's. The client can determine which cleaner the prefer or try other terpene based products specifically designed for ink removal. It should be noted that the terpenes do have an odor that needs to be considered.
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