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CRABTREE, SANDVIK, AND IVES
TABLE V Comparative Value of Various Treatments
[J. S. M. P. E.
Sample
Treatment
102 91 111 93
107
92
Cantol buffed-Sol — No after treatment Cantol buffed-Sol — Wiped with plush Special lubricant — Re-treatment* Cantol buffed-Sol— Re-treatment* 2.0% oil buffed— Re-treatment* Cantol buffed-Sol — Clean
95
Plain buffed-Sol — Re-treatment*
101
0.25% cantol — no buff — Re-treatment**
106
2.0% oil buffed — Clean only
96 97 100
Sol— Clean Sol — Clean and Re treatment* 0.25% cantol — no buff— Clean
94 112
Buffed-Sol— Clean only Special lubricant — not buffed — Cleaned every 10 runs
103
Plain film
* Re-treatment signifies that the sample was cleaned as described and then given the original treatment after every ten projection runs.
** Re-treatment consisted only of cleaning in a bath having the same formula as the original treating solution.
Sol indicates edgewaxing with solution of paraffin wax in carbon tetrachloride.
No. 112 after the first ten runs. This is undoubtedly because the oily protective surface was removed in the subsequent cleaning operations.
The results shown in the case of sample No. 94 would not favor the use of plain buffing with solution edge-waxing if the film was cleaned with carbon tetrachloride after every ten runs without re-waxing.
The ground noise of sample No. 103 which received no treatment increased very rapidly in comparison with that of the tested samples.
TABLE VI Treatments Giving Slight Protection
Sample
Description
96 97
100
106
Solution edge-waxed — Cleaned after every 10 runs Solution edge-waxed — Cleaned and re-treated after every ten runs Bathed in 0.25% solution of cantol wax — Cleaned after every 10 runs Oil buffed — Cleaned after every 10 runs