Textile chemicals to make cotton and rayon resist creasing and mildew are aims of research by DuPont chemist shown here drying treated samples in this laboratory at the Experimental Station. Textile chemical research stems from early work on dyes.
How fast a lacquer or finish will dry is determined by the use of plate glass discs coated with the material to be tested and revolved slowly while a thin trickle of sand falls on them from a cone shaped container. It has been found by DuPont...
A dye worker at DuPont's Chambers Works is shown placing dye cake in trays for drying, after the cake has been removed from a filter press. After grinding, testing and standardizing, the product is ready for shipping.
Oven drying of silicon at DuPont's new plant at Brevard, North Carolina. In this process, silicon needles are dried after a demineralized water wash. The Brevard plant has an annual capacity of 70,000 pounds of silicon a year. Silicon of ultra high...
Drying is a key factor in Freon fluorinated hydrocarbon refrigerants since there must be less than 10 drops of water per ton of gas. The equipment pictured above at the DuPont Company's Chambers Works removes moisture from the Freon.
Text from image: "Loading chamber, center section, and discharge section of freeze drying equipment. Contract 2107. Built for F.J. Stokes Machine Company."
Racks of rayon yarn in cakes pass into huge ovens to dry in temperatures considerably above 100 degrees F., following washing and de-sulfuring plant of E.I du Pont Nemours & Company.
After a preliminary and two water pressure washings, interspersed by high temperature baking in order to remove all formations of viscose, spinnerets are dried in an oven before inspection under a microscope. The procedure for cleaning and checking...
