Catalin
Catalin is a brand name for a thermosetting polymer developed and trademarked in 1927 by the American Catalin Corporation of New York City, when the patent on Bakelite expired that year. A phenol formaldehyde resin, it can be worked with files, grinders, and cutters, and polished to a fine sheen.
Catalin is produced by a two-stage process, different from other types of phenolic resins, and does not contain fillers, such as sawdust or carbon black. Catalin is transparent, near colorless, rather than opaque. Unlike other phenolics, it can be produced in bright colors or even marbled. This fact has made Catalin more popular than other types of Bakelite for consumer products.
Catalin is heavy, quite greasy in feel, and as hard as brass. It is heat resistant and does not soften under boiling water. Like Bakelite, it gives off a distinctive phenolic odour when heated and can be tested by rubbing the material on a cloth with a spot of Simichrome Polish or Formula 409 cleaner, which will leave a characteristic light pink to yellow residue. Due to oxidation, older Catalin items darken in color; white discolors to yellow. This caused interesting effects in radio cabinets made from Catalin. Catalin radios were often made in stylish Art Deco designs and are sought after by collectors.
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