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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. BulkWorkwear

    SuperguardGB Gloves Now Available @Bulkworkwear.co.uk

    CAUTION - HOT DEAL 🔥🔥🔥 SuperguardGB black heavy duty nitrile gloves - Don't settle for anything less! Heavy Duty Powder Free Latex Free Multi Purpose High Quality Food Contact Approved £3.75 per box of 100 disposable gloves - Shop Now
  2. A

    Clear slime and black bacteria seeping out of kitchen mixer joints

    My mother has been away on holiday for a few weeks and she has a kitchen mixer tap that has a very slow drip nothing significant - been like that for a couple of years. The mixer has a a long spout that can be rotated between sink and drain bowl. She left the house meticulously clean. I came to...
  3. BulkWorkwear

    Black Heavy Duty Gloves Deal

  4. A

    32mm Matt Black Metallic Waste Pipes - Where to Get?

    Evening all. Not sure if this is the most appropriate place to post this in the forum, happy to move if not. I'm looking for a metallic 32mm matt black waste pipe, to match up with a matt back trap. The pipe that comes with the trap is 400mm, which isn't long enough for my installation. I'd...
  5. E

    Connecting to black rubber mains pipe

    I have a cold mains in that is a black flexible rubber looking pipe. Please see photo 1. It is currently connected to a 22mm stopcock. I’d like to send it 90 deg to the right. This is so I can lower the shelf above it and have the mains come in at a more convenient place. See photo 2 (with...
  6. robwardinc

    Pinhole in Black Alkathene 17.5 3/8" under concrete driveway

    Pinhole in Black Alkathene 17.5 3/8" under concrete driveway. Hello, we have managed to 'dink' the mains water supply to our house, during some excavations for a drain. And we are hoping for some advice on the best way to proceed. The leak is only a pinhole, but after a few days it has escaped...
  7. C

    Black oily bits coming from hot tap

    Hello there. I wonder whether anyone could suggest what may be the issue with the hot water in my bathroom. I have asked four different plumbers who have come to the house to do work and none of them had a clue. Basically, when I turn on the hot tap on the bath, black bits come out in the...
  8. V

    What is this black box below boiler?

    Can anybody tell me what this solid metal box is below the condensing boiler in my daughter’s house. The boiler is a Remeha Quinta Pro 45 that has been condemned even though it is only eight years old. They have a Corgi contract and they have agreed to pay towards a new boiler as it is less than...
  9. phil hair

    ecotec pro 24 blackscreen

    ecotec pro 24, the display screen goes blank after about 10-15 seconds and boiler is completely dead. isolate it for a couple of mins and it comes back on and repeats. dont do much on these, so is it the board, or will a dodgy component do this to the board? Im thinking the fan, so pump runs...
  10. J

    How to connect this black pipe?

    Hi All, These push fit type pipes are in the bathroom, they twist but I was not able to disconnect the long 35mm black one - quite tight fit. Is there any compression type connector or flexible connector I can use to connect these two pieces or any transition to 40mm system? I have cut it to be...
  11. S

    Black Inlet pipe stopcock

    Main water inlet pipe stopcock seized. Have tried freeing it to no avail so looking to replace it. It's very old as you can see on the attached pictures. I've bought a 25mm stopcock and have a 1" to 22mm reducer. I can't get the reducer to fit over the black pipe as pictured and I'm beginning to...
  12. L

    Black flow meters on new CH system

    Hi Is it normal to have very black UFH flow meters on a relatively new manifold (see image)? (Note the two clear flow meters on the LHS are for circuits which are not yet operational, so no water flow through them as yet.) Background is that I have an unvented system boiler CH system...
  13. P

    Black tank fed shower

    Have tried everywhere to find a black gravity fed shower. Can anybody please help?
  14. V

    Black slime in cistern

    My neighbour has a Siamp built in toilet cistern. He has a problem in that in the winter months he gets black slime building up in the cistern and coating the flush and inlet valves. He only has one toilet so no others to compare it with. Myself and his other neighbours with normal exposed...
  15. M

    URGENT Black Granite Sink

    Looking for a Black Granite Sink that measures 1220 x 50 any suggestions please, all the ones I am finding on the market in Australia are 1160
  16. T

    What's this black stuff?

    Can someone help me out please? These little black flakes are pouring out of my drain. They are all a little larger than the size of pepper flakes and they smudge when I try to wipe them up. They only come out when I only run the hot water, and they come out of every single faucet in the...
  17. K

    Black plastic water pipes

    Hi all. Hope I’m posting in the right place! I have a leaking water supply pipe in my house which is an unfamiliar type for me. It is a black plastic pipe with glued joints about 15mm diameter, which supplies our upstairs bathroom. See photo. the house was built around 1971 but there have been...
  18. S

    Help with Convesa Black Twin Wall flue

    Hi Could anyone help or advise me please? I have a Black 5'' Convesa Twin Wall Flue from my dining room to outside wall, the flue needs another 1000 mm pipe fitting as the cowl is to close to the ridge on my dormer window, the flue was fitted in June 2016, the current Convessa flue is KC which I...
  19. D

    How To Stop Hot Water Tap Black Bits Debris?

    Hello to All, How To Stop The Black Bits Coming From The Baths Hot Tap? Just recently it has been noticed that there have been some ‘Black Bits’ coming from the just the Baths Hot Tap. This is not noticed when using the Cold Tap or any of the other Taps that are Mixer Taps. The Hot Water Tap...
  20. B

    Advice Please - 40mm Solvent Weld in Black inc Tank connectors?

    Hi All I currently have a Koi set up and it's all done with Toolstation push fit connectors (these are an odd size and different to polypipe ones, the ends have a 'clip' that holds the rubber seal in). I have emptied the system due to leaks popping up all over the place, i have elbows, Tee's...
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