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Trial Number 2

Trial Purpose:

Evaluation of cleaning for additional inks

Date Run:

06/22/1998

Experiment Procedure:

Three chemistries from the previous experiment were used in addition to three other chemistries.
One preweighed aluminum coupon for each cleaner was coated with ink using a swab. The coupons sat for three hours and weighed again. A plastic eye dropper was used to transfer the full strength cleaner onto the coupon. After five minutes the coupon was wiped with a paper towel to determine if any cleaning had occurred. Observations were recorded. More cleaner was added to the coupon. At the end of the second five minute interval, coupons were wiped again and observations made. The coupons were wiped dry andfinal weights taken.
SUBSTRATE MATERIAL: Aluminum 6061 T-4
CONTAMINANTS: Ink-Duracell Copper & P200-200 Black Base

Trial Results:

Table 1 lists the observations made at both five minute intervals. Table 2 list the cleaning efficiencies of the cleaners at full strength for each ink.
Table 1. Observations Made

CLEANER 1st OBSERVATION (5 min) 2nd OBSERVATION (10 min)
Soy Gold 1000 Some black removed Removed black but not copper
Shopmaster Some copper-little black Some of both
InproClean 4000T Some copper Some black
Greenstuff Neutral No effect No effect
Safety Wash No effect No effect
HTF 50 Removed most of both Effective removal

Table 2. Cleaning Efficiencies

5 Minutes 4000 T Shopmaster Greenstuff Soy Gold HTF 50 Safe Wash
Copper No value 7.58 1.23 -1.47 95.4 1.14
Black 53.4 1.67 -2.5 -1.65 87.1 -1.18
             
10 Minutes 4000 T Shopmaster Greenstuff Soy Gold HTF 50 Safe Wash
Copper 25.6 43.4 -1.8 -3.9 95.6 1.92
Black 85.5 58.2 -6.91 3.47 91.8 -3.29

Success Rating:

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

Conclusion:

Only one chemistry was effective in removing the two inks, T-Square HTF 50.  This product was then used to clean the red ink from the aluminum coupons.  Upon application, the ink was immediately dissolved by the cleaning chemistry (99.4% removal).  An MSDS and technical data sheet have been included for the product.

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