Coupons were coated with each of the six supplied inks. These included Dykem Stop Off, Markal Valve Action Paint marker, Nu-Mark marker, Sharpie permanent marker, Sakura Coatings Product Company Solid Marker and the Avery Marks-A-Lot permanent marker (black). Once dry, coupons were cleaned using a handheld swab that was immersed into the cleaning product. Cleaning lasted for up to 2 minutes. Following the cleaning, the coupons was wiped once to dry surface. Observations were made and recorded.
Three dilutions were evaluated: 40%, 20% and 10%. If the dilution required under one minute to be effective, then a lower concentration also was evaluated. If the dilution took longer than a minute and a half, a higher concentration was evaluated.
The two most challenging inks for the diluted product were blue sharpie and the black Avery Marks-a-lot marker. The easiest to remove was the Nu Marker, which was cleaned at 10% in less than 20 seconds.
| Contaminant
|
Dilution
|
Observations
|
| Dykem
|
40%
|
40 seconds to clean
|
|
|
20%
|
90 seconds
|
| Markal
|
20%
|
20 seconds
|
|
|
10%
|
40 seconds
|
| Nu Mark
|
20%
|
15 seconds
|
|
|
10%
|
15 seconds
|
| Sharpie
|
20%
|
120 seconds - 90% removed
|
|
|
40%
|
60 seconds - 95% removed
|
| Solid Yellow
|
20%
|
90 seconds
|
|
|
40%
|
90 seconds
|
| Marks-a-lot
|
20%
|
120 seconds -95% removed
|
|
|
40%
|
60 seconds - 95% removed
|