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1950-51 Theatre Catalog, 9th Edition, Page 144 (124)

1950-51 Theatre Catalog, 9th Edition
1950-51 Theatre Catalog
1950-51 Theatre Catalog, 9th Edition, Page 144
Page 144

1950-51 Theatre Catalog, 9th Edition, Page 144

The Potential Uses of Monastral Pigments

The Fastness and Durability of the Colors Of Value in Constructions and Maintenance

Great progress has been made in producing insoluble pigments to serve industry, The introduction of Monastral pigments in the United States market by E. I. duPont deNemours and Company fulfills stringent requirements of many industries which demand high durability and fastness in color.

DeveIOpment work, on manufacturing processes and methods of utilizing Monastral pigments, has been carried on by duPont since 1934. Suiiicient information had been gathered by 1940 to design a plant but the outbreak of war prevented its erection at that time. Limited production, primarily for war purposes, was achieved, but only in temporary facilities under makeshift conditions.

DuPontis expanded facilities, when completed, will supply adequate quantities of the pigments for new construction and extensive repair and renovation programs. Sufficient additional quantities of the pigments will be produced to supply many of the other important uses which have been developed.

Critical materials, such as chromium and lead, widely used in manufacturing green pigments of lower durability, will be released for other purposes through the increased production of Monastral green which does not require these materials,


The Monastral pigments include two brilliant blues and a brilliant green, sold in many physical forms to meet specific application conditions. Due to their high resistance to fading by sunlight, acids, alkalis, and other conditions destructive to colors, the organic Monastral pigments are in great demand, especially by the manufacturers of building materials.

One of the virtues of the Monastral Blue B and Green G pigments is the fact that their full and paste] shades are remarkably similar, covering a narrow color range. Of special interest is their resistance toward most of the things that destroy other colors. They have a high degree of fastness to light, acids, and alkalis such as lime. Moreover, they are insoluble in oil, spirit, and nitrocellulose solvents and will withstand temperatures up to 390 degrees Fahrenheit.


These pigments can be applied to nearly everything needing color and color fastness and durability, and theatres require many of these materials in construction, maintenance and everyday business.

A major portion of duPont production is used in materials for building construction and finishing, such as in roofing granules for colored composition shingles, wallpaper, linoleum, interior and exterior oil, and cold-water paints,

enamels and lacquers, as well as for drapery and other decorative fabrics. Because of their high durability, use of these pigments adds substantially to the life of essential materials used by the builder, and contributes to economies in construction,

Pain-l. Lacquer, Enamels

The paint industry has long felt the need for fine blue and green pigments possessing excellent fastness. Paint is not only used as a protective covering but also needs attractiveness and eyeappeal. Consideration in the selection of a pigment for paints, lacquers and enamels must include such factors as adaptability, ease of application, wettability, texture and color strength.

The Monastral pigments can be particularly recommended for the manufacture of oil paints. In the light and medium shades of bright blue and green exterior trims especially, the Monastral pigments have proven themselves very superior in durability.

When used in nitrocellulose lacquers, the brilliance of the Monastral pigments in the presence of acids and alkalis is a decided advantage.

Quick-drying finishes of synthetic origin have become increasingly impor tant. Here again, the Monastral pig ments are effective in being extremely resistant to light and heat. They may be used in the coloring of tranparent lacquers as well.

Adaptability of pale shades which predominate in this type because of color purity and light fastness are characteristics of the Monastrals. These colors are resistant to the alkaline conditions in the paints themselves and in the walls. .


In the dyeing of certain types of paper the selection of the correct dyes depends upon the ultimate use of the paper. Monastral pigments, manufactured in highly dispersed powder form and also in paste, may be added to the pulp in the beater before the paper is formed, yielding exceptionally bright shades.

These pigments are especially suitable for cover stock or any other stock where particular color permancy is desired.

Monastral pigments are also applicable to coated paper. By using these pigments in varying strengths :1 wide range of shades is obtainable.

The use of artistic wallpapers in modern decoration has emphasized the need for color fastness and resistance to the action of lime in freshly plastered walls and to sunlight. This is particularly important in the case of bright and pastel shades as well as illustrative designs.

Some pigments have been satisfactory in heavy shades, but when used in pastels

they fade out quite rapidly. Some have a tendency to darken while other migrate, and it has been difficult to secure uniformity of shade. A light shade of Monastral pigment when submitted to a Fade-Ometer exposure of more than 200 hours shows practically no change. The wallpaper trade test is 48 hours.


The increasing use of color in interior decoration has created a definite demand for a fast-color base in cement building materials and cement composition fioorings that are used indoors. In addition to fastness, the Monastral pigments combine readily with other pigments of similar characteristics.


Practical tests have demonstrated that the Monastral pigments are excellent in linoleum where both heavy shades and graded light shades are desired. They are also extremely resistant to the high temperatures, which in linoleum processing, frequently run up to 250 degrees Fahrenheit. Linoleum fioorings are repeatedly washed and scrubbed with strongly alkaline soaps that ordinarily have an adverse effect upon ordinary color pigments. There was no blue or green of comparable brilliance in a fast color which could stand soaps and alkalis until the Monastral pigments came along.


The Monastral pigments have proven themselves for certain types of textile printing. Unlike other pigments, they are not sensitive to oxidizing and reducing agents. They can also be used as a throwster's color.

Coated textile fabrics are extensively used for book covers and bindings, washable tablecovers and many other commercial purposes. They are of particular interest as a coloring matter for washable tablecovers because they are fast to alkaline scouring powders, soaps, ammonia, and also to fruit-juice stains.


Monastral pigments are well adapted for use in rubber goods. The color is fast to all conditions of vulcanization, as well as to light. They are insoluble in rubber, hydrocarbon solvents, water, soapy water, and steam. They will neither migrate into adjoining stocks nor stain soapstone, wrappers or other accessory equipment. They are unaffected by the acidity or the alkalinity of the batch or of the lubricant and, consequently, are especially suitable for coloring sponge rubber. There are special brands of Monastrals very controlled as to content of copper and manganese which are available for rubber coloration. Only these special types should be used in rubber.

1950-51 Theatre Catalog, 9th Edition, Page 144