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  2. Paraloid B-72 - Wikipedia

    en.wikipedia.org/wiki/Paraloid_B-72

    Paraloid B-72 or B-72 is a thermoplastic resin that was created by Rohm and Haas for use as a surface coating and as a vehicle for flexographic ink.Subsequently, it has found popular use as an adhesive by conservator-restorers, specifically in the conservation and restoration of ceramic objects, glass objects, [1] the preparation of fossils, the hardening of piano hammers, [2] [3] and can also ...

  3. Stromatolite - Wikipedia

    en.wikipedia.org/wiki/Stromatolite

    Stromatolites are a major constituent of the fossil record of the first forms of life on Earth. [24] They peaked about 1.25 billion years ago (Ga) [ 22 ] and subsequently declined in abundance and diversity, [ 25 ] so that by the start of the Cambrian they had fallen to 20% of their peak.

  4. Fossil preparation - Wikipedia

    en.wikipedia.org/wiki/Fossil_preparation

    Fossil preparation is a complex of tasks that can include excavating, revealing, conserving, and replicating the ancient remains and traces of organisms. It is an integral part of the science of paleontology, of museum exhibition, and the preservation of fossils held in the public trust.

  5. Shellac - Wikipedia

    en.wikipedia.org/wiki/Shellac

    Shellac dissolved in alcohol, typically more dilute than as used in French polish, is now commonly sold as "sanding sealer" by several companies. It is used to seal wooden surfaces, often as preparation for a final more durable finish; it reduces the amount of final coating required by reducing its absorption into the wood. [citation needed]

  6. Geopolymer - Wikipedia

    en.wikipedia.org/wiki/Geopolymer

    The fundamental unit within a geopolymer structure is a tetrahedral complex consisting of silicon or aluminum coordinated through covalent bonds to four oxygens. The geopolymer framework results from the cross-linking between these tetrahedra, which leads to a 3-dimensional aluminosilicate network, where the negative charge associated with tetrahedral aluminium is balanced by a small cationic ...

  7. As Seen on TV: Mighty Mendit not all Billy Mays says ... - AOL

    www.aol.com/news/2009-08-25-as-seen-on-tv-mighty...

    Mighty Mendit essentially is fabric glue, but seems to have an extra oomph, much like using epoxy. It smells very strong, like nail polish remover -- which makes sense since acetone is one of the ...

  8. Levallois technique - Wikipedia

    en.wikipedia.org/wiki/Levallois_technique

    The Levallois technique (IPA:) is a name given by archaeologists to a distinctive type of stone knapping developed around 250,000 to 400,000 [1] years ago during the Middle Palaeolithic period. It is part of the Mousterian stone tool industry, and was used by the Neanderthals in Europe and by modern humans in other regions such as the Levant. [2]

  9. Oldowan - Wikipedia

    en.wikipedia.org/wiki/Oldowan

    Tools made from bone, wood, or other organic materials were therefore in all probability used before the Oldowan. [15] Oldowan stone tools are simply the oldest recognisable tools which have been preserved in the archaeological record. [16] There is a flourishing of Oldowan tools in eastern Africa, spreading to southern Africa, between 2.4 and ...

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