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Bakelite items, particularly jewelry and radios, have become popular collectibles. [45] The term Bakelite is sometimes used in the resale market as a catch-all for various types of early plastics, including Catalin and Faturan, which may be brightly colored, as well as items made of true Bakelite material. [44] [74]
Bakelite, an early plastic, was popular with designers and was an early form of polymer clay, but the phenol base of uncured Bakelite was flammable and was eventually discontinued. Polymer clays were first formulated as a possible replacement for Bakelite.
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. [1] A phenol formaldehyde resin , it can be worked with files, grinders, and cutters, and polished to a fine sheen.
These resins are called resoles. Phenol, formaldehyde, water and catalyst are mixed in the desired amount, depending on the resin to be formed, and are then heated. The first part of the reaction, at around 70 °C, forms a thick reddish-brown tacky material, which is rich in hydroxymethyl and benzylic ether groups.
A thin refractory coating, often calcined alumina, applied in slurry form to batts. Used to reduce the adherence of ware during firing. Also called kiln wash. Bentonite An extremely plastic clay rich in montmorillonite which can be added in small quantities to clays or clay bodies to increase plasticity. Biscuit
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Houston has been on the wrong side of the flag all afternoon, as referee Clay Martin's crew called eight accepted penalties on the Texans and just three on the Chiefs as of early in the fourth ...
[citation needed] In so-called "tri-ply" cookware, the central aluminum layer is paramagnetic, and the interior 18/10 layer may also, but the exterior layer at the base must be ferromagnetic to be compatible with induction cooktops. Stainless steel does not require seasoning to protect the surface from rust, but may be seasoned to provide a non ...