Infinite Sets. If you continue to study this subject you will find discussions about infinite sets, and the idea of different sizes of infinity. That subject has special names like Aleph-null (how many Natural Numbers), Aleph-one and so on, which are used to measure the sizes of sets.
For decades, glossy paper, the type used in magazines, was made using a white clay called kaolin (named after the Chinese region Kao-Ling where it was mined to produce porcelain).
Pulp magazines (often referred to as the pulps) are inexpensive fiction magazines that were published from 1896 to the 1950s. The term pulp derives from the cheap wood pulp paper on which the magazines were printed; in contrast, magazines printed on higher quality paper were called glossies or slicks.