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1950-51 Theatre Catalog, 9th Edition, Page 300 (278)

1950-51 Theatre Catalog, 9th Edition
1950-51 Theatre Catalog
1950-51 Theatre Catalog, 9th Edition, Page 300
Page 300

1950-51 Theatre Catalog, 9th Edition, Page 300

IS THERE ANCHORAGE backing and surface?

to imitation leathers, there are other very important tests for the former that enable the chair manufacturer to obtain the best materials available for his use.

Aging Test

Aging tests on vinyl-chloride imitation leathers are actually plasticizer-removal ones. In actual service, plasticizers are removed from the coatings by normal atmospheric conditions, but the removal is accelerated by changes in temperatures. They are removed also by wiping off on the clothing of chair occupants. When plasticizers are removed, the coating or film returns to its original hard and brittle state, in which it is no longer pliable. Consequently, it cracks and eventually peels from the cloth backing. Aging tests can and are conducted by actual service use, but these obviously take too long for general purposes. Accelerated plasticizer-removal tests are done by ultra-violet exposure, gasoline immersion, and activated-carbon exposure. The latter two give a quick indication of the materials ability to remain pliable throughout its service life. The

WILL IT GET BALD through bad pile anchorage?

ultra-violet test is time-consuming and requires expensive equipment.

The aging characteristic is one of the most important in considering imitation leathers for public seating. Since the end of World War II, hundreds of thousands of yards of these coverings have become hard and boardy with consequent cracking and peeling. There are, however, good formulations in vinyls now that can and are being used safely.

Adhesion Test

Another very important factor in selection and acceptance of imitation leather for public seating is the adhesion of the coating to the backing. Complaints may be brought to a minimum, however, by specifying material with an adhesion value of at least 4.5 pounds. The adhesion is measured on a tensile-recording machine by pulling a 1" strip of coating from a piece of imitation leather at 2"per-minute speed. A dial indicator shows the adhesion resistance in pounds as the tensile pull is made.

Oil-Resistance Test

Human-perspiration oils and popcorn oils have a deteriorating effect on some

types of imitation leather. The rubberbase type, used prior to 1942, softened under these conditions. Certain vinylplastic types have hardened in contact with these types of oils. The laboratory can readily determine the oil resistance in tests designed to bring out these properties, and a definite stand should be taken against use of those materials whose condition is changed by oil contacts.


In addition to the foregoing criteria to be used in the selection of upholstery fabrics for chairs, a number of other discoveries have been made which should prove helpful to those buying theatre seats. The following tips, evolved through extensive laboratory research and field tests, are well worth food for thought:

1. Long-pile mohair fabric, made with at least 225 pile tufts per square inch and 7.4 oz. mohair per square yard content, is an excellent type of soft goods to use in public seating for the following reasons: luxury; distinctive and beautiful lustre; retention of original attractive

FIBRE CONTENT ANALYSIS is a method tor determining the approximate percentage of animal and ot vegetable fibres present. On this will depend its body, wear resistance. lustre. reaction to cleaning. etc.

1950-51 Theatre Catalog, 9th Edition, Page 300