THE freshest of the fresh air we breathe is not pure enough nor clean enough for use in the great plant at Kodak Park where Eastman Film is manufactured.

The location of the Park itself is a precaution. It is away from the smoke and dust of the city. The train loads of raw materials as well as finished products are handled by smokeless locomotives which derive their power from a steam storage tank, while the smoke from the great power plant is carried away by enormous chimneys 366 feet high.

The plant is also a model of cleanliness - but all of these precautions, while quite essential, are not in themselves enough. The real refinement of precautionary measures in the production of film is the conditioning of the air the buildings breathe.

In this conditioning process the air is filtered and washed, heated or cooled, moistened or dried as the case demands, before it is allowed to enter the rooms where emulsions are made, or where film is coated or dried or packed. But always the air is cleaned.

The air is drawn into the buildings, - breathed, we might say, - through great batteries of filter bags that look like small dirigible balloons, open at one end. This filtering process removes the greater part of the dirt.

The air then passes through an air washer which consists of a series of banks of sprays extended across the air tunnel or air passage. Each bank of sprays spreads out a curtain of dense, finely divided water through which the air must pass.

This is the washing process. The air that passes through this spray chamber is thoroughly cleansed, the last vestige of dirt being removed when the air impinges on water-covered baffle-plates between which it passes as it leaves the air washer.

The air may then be heated or cooled as is required, but its conditioning so far as moisture content is concerned is usually brought about in the spray chamber when it is washed.

The air that is used in drying freshly coated film must contain a small but a very definite and uniform amount of moisture.

If it is a humid summer day the air will usually contain so much moisture that a considerable amount of it must be removed before the air can be used.

It may sound paradoxical but it is a fact that the moisture can be removed when the air is washed. A spray of cold water will remove moisture from warm air as it washes it, while a spray of warm water will put moisture into the air.

A Glimpse Of Kodak Park Which Shows The Ideal Factory Environment.

A Glimpse Of Kodak Park Which Shows The Ideal Factory Environment.

While the greatest precautions are taken in the manufacture of film, every building in Kodak Park that produces or helps to produce sensitized materials breathes air that is filtered and washed - air such as we ordinary humans seldom ever breathe except in those periods directly after a refreshing rain storm when one is likely to say: "My,doesn't the air smell fresh and clean?" Dust and dirt have no part in the manufacture of sensitive materials so we eliminate them. Uniformity of product depends upon uniform manufacturing conditions, so we maintain such conditions by refrigeration, by heat, by air conditioning, twenty-four hours of every day throughout the year.