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# Title Date(s) Contributor(s) Description Description Collection ID Hagley ID Collection
1 Judging dyed skeins 1945 E.I. du Pont de Nemours & Company (originator) Judging dyed skeins for strength and shade of the dye under north light in the Standardization Lab of the Technical Laboratory, Dyestuffs Division of the DuPont Company.
DuPont Company Product Information photographs (Accession 1972.341) 1972341_3008 DuPont Product Information photographs
2 Determining the drying time of lacquer 1937-12 E.I. du Pont de Nemours & Company (originator) 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 chemists that the point at which the sand no longer adheres accurately determines the drying time.
DuPont Company Product Information photographs (Accession 1972.341) 1972341_2782 DuPont Product Information photographs
3 A 'quartz fingernail' used to determine hardness of paint films 1930/1939, 1930, 1939 E.I. du Pont de Nemours & Company (originator) A 'quartz fingernail' is used by DuPont chemists to determine how hard a paint film is. The device measures the weight necessary to drive the rounded end of a quartz rod a given distance into the film. In this manner the exact hardness of the paint is ascertained,
DuPont Company Product Information photographs (Accession 1972.341) 1972341_2779 DuPont Product Information photographs
4 Determining the degree of gloss 1938-02 E.I. du Pont de Nemours & Company (originator) To determine the degree of gloss in a lacquer or finish, du Pont chemists use a device that measures the amount of light reflected. The light from a constant source is thrown back from the panel into the telescope tube. One half of the 'eyepiece' is illuminated by this reflected radiation, with the other half lighted by a small bulb in the photometer tube attached to the side of the telescope. This light is passed back and forth in the tube until the brightness of the two section meet. The...
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To determine the degree of gloss in a lacquer or finish, du Pont chemists use a device that measures the amount of light reflected. The light from a constant source is thrown back from the panel into the telescope tube. One half of the 'eyepiece' is illuminated by this reflected radiation, with the other half lighted by a small bulb in the photometer tube attached to the side of the telescope. This light is passed back and forth in the tube until the brightness of the two section meet. The distance of the light from the 'eyepiece' is then a measure of the amount of light reflected or the gloss.
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DuPont Company Product Information photographs (Accession 1972.341) 1972341_2784 DuPont Product Information photographs
5 Testing resin at Marshall Laboratory in Philadelphia, Pennsylvania 1955 E.I. du Pont de Nemours & Company (originator) At DuPont, research is constantly being enlarged and broadened. Ideas for new products and new processes are always being studied in laboratories, such as the one shown here at Marshall Laboratory in Philadelphia, Pennsylvania. Here a scientist checks vacuum distillation equipment as he experiments with a potential new resin formula for paint.
DuPont Company Product Information photographs (Accession 1972.341) 1972341_2788 DuPont Product Information photographs
6 Testing stencil paste 1930/1939, 1930, 1939 E.I. du Pont de Nemours & Company (originator) A result of the testing of stencil paste in the control laboratory of the DuPont Philadelphia Paint Plant.
DuPont Company Product Information photographs (Accession 1972.341) 1972341_2785 DuPont Product Information photographs
7 Determining the melting point 1955 E.I. du Pont de Nemours & Company (originator) This DuPont chemist is making a precise determination of the melting point of a new compound obtained during the course of his research investigation in the laboratory of the Electrochemical Department. The products of this department have a broad range of industrial applications and the research has a correspondingly broad scope.
DuPont Company Product Information photographs (Accession 1972.341) 1972341_4465 DuPont Product Information photographs
8 Determining a chemical reaction 1955 E.I. du Pont de Nemours & Company (originator) A DuPont chemist uses electrochemical measurements to determine the course of an organic chemical reaction. This picture was taken at the in Department research lab at the company's Experimental Station.
DuPont Company Product Information photographs (Accession 1972.341) 1972341_4412 DuPont Product Information photographs
9 Chemists study slide before a background of photomicrographs 1955 E.I. du Pont de Nemours & Company (originator) DuPont chemists, engaged in fundamental research at the company's Experimental Station, study a slide before a background of photomicrographs.
DuPont Company Product Information photographs (Accession 1972.341) 1972341_4474 DuPont Product Information photographs
10 Nobel prize winner Professor Peter Debye addresses a group of DuPont scientists 1955 E.I. du Pont de Nemours & Company (originator) Nobel prize winner Professor Peter Debye of Cornell University, a DuPont consultant, addresses a group of DuPont scientists at the company's Experimental Station. Professor Debye is one of a large number of outstanding university scientists who serve in a consulting capacity at the company's research divisions.
DuPont Company Product Information photographs (Accession 1972.341) 1972341_4471 DuPont Product Information photographs
11 Employee at work at the Haskell Laboratory of Industrial Toxicology 1955 E.I. du Pont de Nemours & Company (originator) DuPont Company Product Information photographs (Accession 1972.341) 1972341_3909 DuPont Product Information photographs
12 Lab consultations at E.I. du Pont de Nemours & Company laboratories 1955 E.I. du Pont de Nemours & Company (originator) Through regular visits to DuPont Company labs some 60 university scientists, acting as consultants, give DuPont chemists the benefit of their broad experience. Shown here, left, is Professor Roger Adams of the University of Illinois.
DuPont Company Product Information photographs (Accession 1972.341) 1972341_4475 DuPont Product Information photographs
13 Employees of the Haskell Laboratory of Industrial Toxicology 1955 E.I. du Pont de Nemours & Company (originator) DuPont Company Product Information photographs (Accession 1972.341) 1972341_3906 DuPont Product Information photographs

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