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Trial Number 5

Trial Purpose:

To evaluate the efficacy of previously identified solvents and mixture in removing sharpie ink from aluminum panels via manual wipe

Date Run:

02/14/2024

Experiment Procedure:

Three aluminum coupons were used per cleaner for a total of 9 coupons.  The coupons soiled with sharpie ink by drawing a squiggle along the bottom third of the coupon. The dirty visual rankings were then recorded.  The coupons were then cleaned with their respective cleaners by manually wiping a paper towel wet with the cleaner on the coupons for a total of 5 seconds.  The cleaned visual rankings were then recorded.  

Visual Rankings Key:

1: 100% soil removed

2: 75% soil removed

3: 50% soil removed

4: 25% soil removed

5: 0% soil removed

Trial Results:

Cleaner Dirty Visual Clean Visual AVG Clean Visual
Dimethyl Carbonate 5 1 1.2
5 1.5
5 1
Ethyl Acetate 5 1 1.0
5 1
5 1
62% Dimethyl Carbonate + 38% Ethyl Acetate 5 1 1.0
5 1
5 1

Success Rating:

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

Conclusion:

Dimethyl Carbonate, Ethyl Acetate, and the mixture of 62% Ethyl Acetate + 38% Dimethyl Carbonate were all able to effectively remove sharpie ink from aluminum coupons within 5 seconds via manual wiping.  

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