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Black is a color which results from the absence or complete absorption of visible light. It is an achromatic color, without hue, like white and gray. It is often used symbolically or figuratively to represent darkness. Black and white have often been used to describe opposites such as good and evil, the Dark Ages versus Age of Enlightenment, and night versus day. Since the Middle Ages, black has been the symbolic color of solemnity and authority, and for this reason is still commonly worn by judges and magistrates.Black was one of the first colors used by artists in neolithic cave paintings. It was used in ancient Egypt and Greece as the color of the underworld. In the Roman Empire, it became the color of mourning, and over the centuries it was frequently associated with death, evil, witches, and magic. In the 14th century, it was worn by royalty, clergy, judges and government officials in much of Europe. It became the color worn by English romantic poets, businessmen and statesmen in the 19th century, and a high fashion color in the 20th century. According to surveys in Europe and North America, it is the color most commonly associated with mourning, the end, secrets, magic, force, violence, evil and elegance.Black ink is the most common color used for printing books, newspapers and documents, as it provides the highest contrast with white paper and thus is the easiest color to read. Similarly, black text on a white screen is the most common format used on computer screens. As of September 2019, the darkest material is made by MIT engineers from vertically aligned carbon nanotubes.

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  1. M

    Bleed screw on baxi bahama100 water pump

    Hi guys Could anyone give me any info on the water pump bleed Screw on baxi 100, I need to release air from pump after draining and there is no silver screw on The front to use only a black plastic cap which pulls off and a small nut in the middle Is this it??? Or not Cheers Michael
  2. N

    Recommend fault finding books

    Can anyone recommend any good books for fault finding on domestic boilers/ combi boilers? I have recently passed my ACS and CENWAT but lack experience of fault finding! I’ve seen online Central Heating Combination Boilers? Fault Finding & Repair? is the latest publication from author John...
  3. T

    drainage problem

    Got called to a problem where shower tray wasn,t draining away,cleared the blockage but noticed when draining a full wash hand basin water is coming up the shower tray.The set up is shower tray waste pipe runs along the wall to the outside downpipe and a T-piece collects the water from the WHB...
  4. R

    no water pressure coming out of the hot taps

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    • richymac81
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  5. S

    glowworm micron black sooting above flue

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  6. H

    Rothy gas bottle recall

    News - Rothenberger issues urgent global product recall Incase it hasn't been posted already.
  7. G

    Biasi M90E24s no hot water?????????

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  8. B

    Replace old Sangamo M5 for Drayton LP722

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  9. C

    Black walls?

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  10. I

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  11. V

    Ferroli Optimax HE 31C Error 37f HELP

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  12. P

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  13. M

    black plastic incoming mains pipe??

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  14. R

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  15. F

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  16. D

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  17. B

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  18. M

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  19. L

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  20. R

    Firebird oil boiler, black smoke problem

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