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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. R

    Black Friday: Price Rush

    VERY limited stock! When they are gone, they are gone. All prices ex vat, all boilers exclude flue Worcester 25i combi £399 Logic + 30 Kw combi £499 Intergas Rapid 32 £399 Vaillant Ecotec Plus 428 £499 60m (2 bundles) of copper tube 15mm Max one of each boiler per customer, or 4 packs...
  2. R

    Black Friday weekend offer thread

    After all that build up, at last - the actual deals! We are having a bit of difficulty sequencing the offers on the "latest offers" page of the website, so you might have to search a bit for your deals - but its only about 6 or 7 pages. These are the basic offers. They will stay up on the site...
  3. R

    Black Friday. The final countdown.

    If you haven't already registered, you have only a few hours left before the ultimate heating and plumbing sale goes live. This is not open to the general public - you must be genuinely trade to register at www.tradeonlyplumbing.co.uk
  4. R

    Black Friday teaser #4

    Hi All Did I mention the 15mm tube at 82.5p + VAT per metre or £24.75 + VAT per bundle? This is not available now, so please don't ask me to reserve you any - you have to be on the site when we release the deal - and since it is MILES below cost, it is also limited to a max amount per...
  5. R

    Black Friday teaser offer #3

    Hmmm. Which one to mention?
  6. R

    Black Friday teaser offer #2

    Here's one more to whet your appetite. On Friday night, we will list Magnacleanse flushing units. There are only 10 available in this promotion. On Friday night, they will cost £249 + VAT. Thats a pretty good price. If there are any left, at some point on Saturday morning, the price...
  7. R

    Black Friday teaser offer

    Hi All We have had lots of questions about what will be on offer over the Black Friday weekend. Its been a closely guarded secret - not even the staff know. However, just to raise the suspense level, I will uncover this one offer... At some point over the weekend, we will release a limited...
  8. U

    Cold water copper pipe is black & brittle

    Our plumber has just fixed a cracked copper pipe behind the dishwasher. When the dishwasher was removed, we noticed the pipe was completely black & the outside was coated in a dull, thick black coating. The warm water pipe next to it is a normal copper colour as are all our other pipes. The...
  9. B

    black or blue label...does it matter?

    I came across someone who was telling me that black label copper pipes are better than blue ones? i've never paid any attention to the colours..... anyone know if there is a difference between the 2?
  10. R

    Black Friday: the empire strikes back

    https://youtu.be/Bz4A9X8lJ_o For more info, follow this link Don't miss out. Make sure that you are registered at www.tradeonlyplumbing.co.uk Once Black Friday arrives, it may be too late to register
  11. R

    Black Friday

    https://www.youtube.com/watch?v=SI8ltlLx23I&feature=youtu.be To learn more: click here If you are trade, but aren't already registered at Williams & Co | Trade Only Plumbing & Heating Supplies then click here Strictly trade only - registrations from non-trade customers will not be...
  12. W

    Black bits in flush

    Hello hope you can help. We have new wicks toilet installed and are having black bits collecting under rim and going down into pan on flushing. I am cleaning every couple of days as they build up. This did not happen with old toilet removed. Any advise on what to check. Water in cistern is clear.
  13. D

    Got a problem with my U Bend on my kitchen sink

    Hi I've got a problem when trying to reconnect my U bend underneath my kitchen sink. I've been trying to clean out all the gunk that has built up from using the sink, so I removed the u bend pipe underneath the sink, removed any extraneous matter that may be causing any blockages. However, I...
    • DanielDeronda
    • Thread
    • bend black can't compression inside kitchen kitchen sink problem sink washer
    • Replies: 14
    • Forum: Plumbing Jobs | The Job-board
  14. hammers4spanner

    Plastic Pipe

    Anyone know why the water in this stuff gets so much iron oxide inside? Drained a heating system this week plastic pipe all over the house and its black as hell full of rust and bits of sediment . Use to see this a lot on new builds as well all barrier pipe used but still goes to pot inside...
  15. S

    RIP Cilla Black

    Great entertainer.
  16. D

    Black Tot Day

    For your information (Adam) . Black Tot Day (July 31, 1970) is the name given to the last day on which the Royal Navy issued sailors with a daily rum ration (the daily tot). So, in commemoration of this the drinks are on me. BUT it'll be dark rum only, Pussers Royal Navy Rum preferred...
  17. M

    Black pipe for inside of trap - where to put it back?!

    This is really silly and driving me mad! Bathrooom basin was blocked. I undid the trap and cleared it, but I can't figure out where to put the plastic tube that goes inside the trap to stop it leaking. The only obvious place it fits inside the vertical metal, but if it goes there the water...
  18. J

    Elson Coral E Hot Water Storage Low Temperature and Pressure

    I have an Elson Coral E Hot water tank in my all-electric flat. I've had it for about 2 and a half years without any problems, however recently I have noticed that the hot water pressure is not as much as it used to be and the temperature I get from the hot taps is reduced. I have tried...
    • johnhalsey
    • Thread
    • black elson hot hot water pressure scale storage temperature valve water
    • Replies: 9
    • Forum: Plumbing Jobs | The Job-board
  19. D

    RIDGID K-400 , or Virax VAL 80E

    Trying to decide , which one to buy between a RIDGID K-400 at 985€ and a Virax VAL 80E at 1.219€ . These are the prices , the machines are sold in Greece , where I live . The only difference I can see , is the metal VAL’s drum , instead of the plastic of Ridgid . Is that “paying” for the...
  20. A

    copper pipes turned black?

    Hi fellas, Oil boiler situated in utility room - installed about 4 years ago apparently......quite long runs of copper running up wall into roof space. However all the copper has turned almost black - at first glance I thought somebody had coated it with something but owner says no it has just...
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