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  2. HP Envy - Wikipedia

    en.wikipedia.org/wiki/HP_Envy

    The Envy Spectre XT is a 13-inch ultrabook released in 2012 and removed from HP's 2013 Envy lineup. It weighs 3 pounds (1.4 kg) and includes a 1366 × 768 display, buttonless multi-touch touchpad, and solid-state drive. The HP Envy Spectre XT runs Windows 7. [34] Envy Spectre XT Pro Same model with Tpm module and windows 7 Pro. [35]

  3. Ink cartridge - Wikipedia

    en.wikipedia.org/wiki/Ink_cartridge

    Two cartridges; one with black ink (a third-party HP 15 compatible cartridge), one with colored inks (an original type HP 17 tri-color cartridge) currently installed in an HP inkjet printer. An ink cartridge or inkjet cartridge is a component of an inkjet printer that contains ink to be deposited onto paper during printing. [1]

  4. Paper and ink testing - Wikipedia

    en.wikipedia.org/wiki/Paper_and_ink_testing

    Ink requirement is defined as the amount of ink needed to print a unit area with a standard Solid Ink Density. For newsprint, the ISO 12647-3 specification is C 0.90, M 0.90, Y 0.90 and K 1.10, Status E, D50, 2o, density minus paper with polarization filter. Ink requirement is measured as g/m2 (grams of ink required to print 1 m2 of paper)

  5. Iron gall ink - Wikipedia

    en.wikipedia.org/wiki/Iron_gall_ink

    Iron gall ink (also known as common ink, standard ink, oak gall ink or iron gall nut ink) is a purple-black or brown-black ink made from iron salts and tannic acids from vegetable sources. It was the standard ink formulation used in Europe for the 1400-year period between the 5th and 19th centuries, remained in widespread use well into the 20th ...

  6. Aircraft maintenance checks - Wikipedia

    en.wikipedia.org/wiki/Aircraft_maintenance_checks

    The C check is performed approximately every 20–24 months, or a specific number of actual flight hours (FH), or as defined by the manufacturer. This maintenance check is much more extensive than the B check, requiring a large majority of the aircraft's components to be inspected. This check puts the aircraft out of service for 1–4 weeks.

  7. Blue Wool Scale - Wikipedia

    en.wikipedia.org/wiki/Blue_Wool_Scale

    The ultraviolet (UV) radiation in light is responsible for ink fading. As the intensity of UV radiation differs from place to place, the ink fading also depends on place. It will be more in areas with more UV radiation and vice versa. This difficulty is overcome by the bluewool testing method. Absolute values of fading will depend on light ...