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Trial Number 2

Trial Purpose:

To evaluate successful cleaners on supplied parts.

Date Run:


Experiment Procedure:

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.

Trial Results:

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

Success Rating:

A follow up test, usually based on company input.


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.

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