Trial #2
To evaluate successful cleaners on supplied parts.
The four products from the previous trial were used at full strength and heated to 130 F on a hot plate in 400 ml beakers. Using a soft paper towel soaked in each heated solution, lenses were wiped until the ink was removed. The time required to clean was recorded. A second evaluation with the products involved soaking the lenses in the solution for 5 minutes, making observations through out the soak. At the end, the lenses was wiped for a maximum of 10 seconds. The lenses were then rinsed in a tap water rinse at 120 F for 10 seconds and wiped dry.
All products were able to remove all of the ink in less than 1 minute during the manual wipe cleaning. Loctite 7360 was the fastest, removing the ink within 17 seconds. None of the products dissolved the ink from the lenses within the 5 minute soak cleaning. The following table lists the observations made during each cleaning process.
| Wipe Observations
|
Soak Observations
|
W ank +
|
|
S rank / 2
|
=
|
Overall Rank
|
| 24 seconds
|
No dissolving, wipe at end was easy
|
3
|
+
|
2
|
=
|
2.5
|
| 19 seconds
|
Wipe did not remove all the ink
|
2
|
+
|
4
|
=
|
3
|
| 17 seconds
|
Possible dissolving, easily wiped
|
1
|
+
|
1
|
=
|
1
|
| 48 seconds
|
Small amount of ink left
|
4
|
+
|
3
|
=
|
3.5
|
A follow up test will be run on the top two products, Loctite 7360 and Bio T Max, to determine how long to soak the lenses to remove the ink with no wiping.
No relation