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color
Color (American English) or colour (Commonwealth English) is the visual perceptual property corresponding in humans to the categories called blue, green, red, etc. Color derives from the spectrum of light (distribution of light power versus wavelength) interacting in the eye with the spectral sensitivities of the light receptors. Color categories and physical specifications of color are also associated with objects or materials based on their physical properties such as light absorption, reflection, or emission spectra. By defining a color space colors can be identified numerically by their coordinates.
Because perception of color stems from the varying spectral sensitivity of different types of cone cells in the retina to different parts of the spectrum, colors may be defined and quantified by the degree to which they stimulate these cells. These physical or physiological quantifications of color, however, do not fully explain the psychophysical perception of color appearance.
The science of color is sometimes called chromatics, colorimetry, or simply color science. It includes the perception of color by the human eye and brain, the origin of color in materials, color theory in art, and the physics of electromagnetic radiation in the visible range (that is, what is commonly referred to simply as light).
Hi
having trouble finding a part for my armitage shanks bathroom sink. Its the bit at the end of the tap, a flow diffuser type thingy... sorry I don't know the proper terminology. Its old and has just deteriorated.
The standard ones I find to buy are screw-in ones that are supposed to fit on...
Had this email today.
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Grundfos Pumps have issued a safety warning about an early model of its CONLIFT range of compact condensate pumps. These pumps are typically used in domestic and commercial applications such as condensing boilers, air-conditioning, dehumidifiers...
What could be the cause of a plumbing problem as follows in a house, the pipes bang when any tap is turned on. However when the mixer mixer shower in the bathroom is isolated by two iso valves. There is no banging from any taps. If I turn the iso valves back on nothing bangs but then when turn...
My daughter has a pumped shower that doesn’t always start without a bit of fiddling. I think the problem is lack of head. How can I test the flow that’s available when pump off, as I believe that the newish Salamander pump needs a min. of 2L per min?
Do I test from the shower head end of shower...
Hi All,
This is a bit of a convoluted issue so please bear with me as I am not a trade professional & apologies for the length. If this in the wrong section, will the mods please kindly re-direct to the correct one!
We have been suffering an infestation of rats in our house (semi detached...
Bazzy
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advice
between
color
help
help needed
manhole
needed
nightmare
rainwater
verdana
water
Hi,
I’ve had along running problem that re-occurs with Hot water on my alpha 240p.Basically turn tap on, boiler flue neon flickers/clicking, burners trying to fire up and fan increasing speed then cutting out, try's again. Sometimes it will fire up ok or eventually, other times you have to...
slyfox
Thread
again
alpha
boiler
color
engineer
fault
hot
hot water
intermittent
water
I was called to a house that reported the hot water header tank was over flowing, so I expected a passing float valve and visited.
The valve operated correctly and the problem was more involved. They have 3 showers running from a Salamander 3 bar pump. The pump and installation seem fine and a...
coggers
Thread
color
noise
overflow
problem
pump
pumped
pumped shower
shower
showers
water
Hi,
I've extended my mains water mdpe pipe through into my new extension and brought it up through the slab under the new kitchen window. However, I've had to change my kitchen window into a set of French doors and so the pipe is now in the way. I want to break into the slab back down to the...
Jim4093
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color
concrete
connectors
mdpe
uictfonttextstylebody
Thread restarted as I have now registered...advice please on below......
** I have the above boiler - the pressure bar is in the red but I can't find anywhere in the manual which shows how to lower the water pressure - Does anyone know please? Thank you
** The easiest way Is to bleed the...
Jmb01
Thread
boiler
color
eco
high
high pressure
oil
plus
pressure
thread
uictfonttextstylebody
vaillant
water
Hi, New member registered.
No profile as a very bad diyer !
Found your forum with Google search.
Original problem leaking Sharvin lever tap. Wanted newer tap fitted.
Product bought Swirl tap reviver kit 1/2 lever.
Problem I have is this: Fitted one lever handle,headgear, cold water tap...
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...
Hi Everyone.
I`m studding Level 3 Diploma in domestic gas utilisation and maintenance 6014-03
which is 6 months course and is toward ending but i realize they dont teach you enough.
i`m willing to work with gas safe engineer or help them for free to gain some knowledge in return
Does anyone...
Altin
Thread
color
engineer
free
gas
gas engineer
knowledge
looking
plumber
work
HELP!
Am selling my house and my very old yet reliable boiler failed its safety inspection on its casing seal. Apart from thats its great. Everywhere I ask this item is obsolete. and if I can't find the part I will have to give the buyers £3k for a new boiler which i so don't want to do...
Any...
Dear all;
Hoping you can help. Our Hydramax shower (this one: AQUALISA HYDRAMAX Exposed shower valve Spares and Spare Parts) is leaking from a small hole underneath. This seems to be a pressure relief valve?
However I just checked and even if I cover this with my finger, water is spewing out...
Post Gas training Lomax wallsend
Hi everyone I am John. 33 from newcastle with little experiance I am currently deciding weather or not to take up a 6 mth course to become gas safe.
After 22 week course you get awarded BPEC gas foundation certificate.
ACS ccn1 & Cenwat certification.
After...
Dear all, not sure I'm in the correct forum here! I'm Kevin and new to the site only this morning although I do check it out from time to time. I'm a gas safe registered engineer of 22years and have decided to change direction slightly and focus solely on boiler breakdowns and servicing having...
Hello people, Does anyone have an opinion of the best trade sites out there, and what are they? I have started using my builder and am in two minds about it, I have recently moved and looking for more trade not sure wether or not this is the way to go as I seem to get messed about by customers...
Hello to all. My sister lives in a first floor flat and needs an outside tap. I can drill through the wall into her bathroom to tee into the cold water supply. However, I will need to run a pipe down the outside of the building to a new wall plate and tap at ground level.
I will have to...
Alright lads and ladies.
just in the process of getting an analyser for work and I'm thinking about ordering the testo 330-2 ll pro kit.
In the future I'll be working on oil boilers but noticed it said light oil.
Not worked on oil before so am I likely to come across heavy fuel
oil or will...
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