Pre-contaminated graphite fixtures were provided by the company. Each of the four cells on one fixture was rated based on how contaminated they were initially and rated again after drying. The following visual rating keys were used.
Initial Visual Rating Key
| #
|
Description
|
| 1
|
No contamination
|
| 2
|
Minimal contamination
|
| 3
|
Partially contaminated
|
| 4
|
Mostly contaminated
|
| 5
|
Completely contaminated
|
Final Visual Rating Key
| #
|
Description
|
| 1
|
Completely removed
|
| 2
|
Mostly removed
|
| 3
|
Partially removed
|
| 4
|
Minimal removal
|
| 5
|
No removal
|
One fixture was immersed in an unheated cleaner for 15 minutes. Visual observations of the fixture and flux removal were taken every five minutes, and the fixtures were air dried with room temperature forced air for five minutes before final observations.