Quote Originally Posted by Photo Engineer
This is called 'wet gate' printing in the motion picture industry. The common wetting material is, or was, a silicone oil which can be easily removed from the negative.

It has been proven to improve print quality and has stood the test of time.

There was a thread here or on PN recently with lots more information.

PE
Sorry Photo Engineer, that is wrong. The fluid is perchlorethylene, or dry cleaning fluid as most people call it, a solvent that is used because has relatively the same optical refractive index of acetate and is a pretty good degreaser.

We use about 500 gallons of the stuff a year in our motion picture wetgate printers and in our Lipsner/Smith Mark IV ultrasonic cleaners.

Wet gate printing (for motion pictures) was developed by the Technicolor Corporation and has been refined over the years by others, but I have never heard of silicone oil being used as a wet gate agent...

Of course, the properties of noseoil are legend, right?

I don't know about the optical properties of silicone oil; it might possibly work in an optical printer, like an Oxberry or an Acme , but it would prove disastrous for continuous contact printing, where the oil would make contact with the element being exposed, which is the bulk of what we do.