The silicon oil was smeared on the five polycarbonate parts and allowed to age for two hours. Cleaning was performed in a Crest Ultrasonic Unit for 15 minutes set at 140 F. The parts were rinsed in a tap water bath and then a DI water bath. Both rinses were for 5 minutes at 140 F. The parts were then dried under air knives for two minutes and then under and IR lamp for 30 minutes. The parts were then analyzed under a black light for fluorescence and visually inspected for any water spotting.
Visually, the parts were very clean. Upon inspection under black light, part #5 had two areas of oil on it. No water spotting was evident on the parts.
Success Rating:
Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
Conclusion:
The Valtron cleaners was basically successful. A longer cleaning time and additional rinses should solve the problem of the oil remaining on part #5.
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The Toxics Use Reduction Institute at the University of Massachusetts Lowell (“TURI”), is a state agency and public institution of higher education, formed under MGL c. 75, and the Toxics Use Reduction Act (“TURA”), MGL c. 21I.
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