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  2. White Portland cement - Wikipedia

    en.wikipedia.org/wiki/White_Portland_cement

    The pigments may be added at the concrete mixer. Alternatively, to guarantee repeatable color, some manufacturers supply ready-blended colored cements, using white cement as a base. To be "white", the powdered material must have a reflectance value ( "L value" ) in excess of 85%.

  3. List of fictional elements, materials, isotopes and subatomic ...

    en.wikipedia.org/wiki/List_of_fictional_elements...

    Katakana: ヒヒイロカネ or kanji: 緋々色金 It is a red-orange fantasy metal that is common in Japanese fiction. Hyperium: Giants: One of three stable transuranic elements predicted by the new science of nucleonics in James P. Hogan's Giants series. Not naturally occurring outside of neutron stars, but trace amounts are created in the ...

  4. Materials science in science fiction - Wikipedia

    en.wikipedia.org/wiki/Materials_science_in...

    Materials science in science fiction is the study of how materials science is portrayed in works of science fiction.The accuracy of the materials science portrayed spans a wide range – sometimes it is an extrapolation of existing technology, sometimes it is a physically realistic portrayal of a far-out technology, and sometimes it is simply a plot device that looks scientific, but has no ...

  5. Science fiction - Wikipedia

    en.wikipedia.org/wiki/Science_fiction

    Science fiction (sometimes shortened to sci-fi or abbreviated SF) is a genre of speculative fiction which typically deals with imaginative and futuristic concepts such as advanced science and technology, space exploration, time travel, parallel universes, and extraterrestrial life.

  6. Hard science fiction - Wikipedia

    en.wikipedia.org/wiki/Hard_science_fiction

    Hard science fiction is a category of science fiction characterized by concern for scientific accuracy and logic. [ 1 ] [ 2 ] [ 3 ] The term was first used in print in 1957 by P. Schuyler Miller in a review of John W. Campbell 's Islands of Space in the November issue of Astounding Science Fiction .

  7. Science in science fiction - Wikipedia

    en.wikipedia.org/wiki/Science_in_science_fiction

    Science in science fiction is the study or of how science is portrayed in works of science fiction, including novels, stories, and films. It covers a large range of topics. Hard science fiction is based on engineering or the "hard" sciences (for example, physics, astronomy, or chemistry).

  8. Pigment - Wikipedia

    en.wikipedia.org/wiki/Pigment

    Pigments for sale at a market stall in Goa, India. A pigment is a powder used to add color or change visual appearance. Pigments are completely or nearly insoluble and chemically unreactive in water or another medium; in contrast, dyes are colored substances which are soluble or go into solution at some stage in their use.

  9. Outline of science fiction - Wikipedia

    en.wikipedia.org/wiki/Outline_of_science_fiction

    Science fiction genre – while science fiction is a genre of fiction, a science fiction genre is a subgenre within science fiction. Science fiction may be divided along any number of overlapping axes. Gary K. Wolfe's Critical Terms for Science Fiction and Fantasy identifies over 30 subdivisions of science fiction, not including science fantasy ...