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Apiezon Type M Vacuum Grease is a good and economical high-vacuum grade lubricant. Initial pumpdown
characteristics, at room temperature, are excellent. This is clearly the world's
most widely used vacuum grease in electron microscope laboratories including use
in both the electron microscope itself and the ancillary vacuum evaporator
equipment. However, being completely hydrocarbon based completely free of silicones
and halogens, there is some contribution to column
contamination. Vapor pressure 2x10-9 torr at 20° C. Not intended for use where
temperatures exceed 30° C. |
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