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Trial Number 1

Trial Purpose:

Four terpene based cleaners were tested

Date Run:

07/09/1997

Experiment Procedure:

Four coupons were handled as in the previous trial with weighing and contamination application. Four terpene based cleaners were selected due to their possible cleaning capabilities.
SUBSTRATE MATERIAL: Stainless Steel
CONTAMINANTS: Ink--Steel Blue DX-100 solvent based dye

Trial Results:

coupon # Coupon contaminated cleaned remaining  %cont comments
  weight coupon wt wt contam coupon wt contaminate remaining
9 63.223 63.2503 0.0273 63.2307 0.0077 28.2051 good removal time
10 63.072 63.0919 0.0199 63.0732 0.0012 6.03015 excellent removal time
11 62.8395 62.8499 0.0104 62.8357 -0.0038 -36.5385 damage-excellent time
12 63.2235 63.242 0.0185 63.2418 0.0183 98.9189 poor cleaning time
cleaner ID  
9 Terpene Technology HTF-50
10 Terpene Technology HTF-60
11 T Square HTF-50
12 T Square HTF-321

Of the four terpene cleaners used in the trial, it was determined after the experiment was performed that Terpene Technologies was the same company as T Square, therefore only two new cleaners were chosen for testing. Number 9 was the same as number 11 and number 12 was the same as number 2 from the previous trial.  HTF-50 and -60 both removed the ink from the coupons.  HTF-321 did not clean well during the second trial unlike the first trial.

Success Rating:

Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.

Conclusion:

From the two new cleaners actually used, both appeared able to remove the ink from the substrate.  During one of HTF-50's trials, damage to the coupon was noticed through gravimetric analysis.  The amount of damage to the coupon was not significant enough to worry about when the sizes of the parts to be cleaned were considered.  The parts being cleaned are several magnitudes larger than the coupons and the small amount of damage would not be noticed

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