NCS-karta

0202303040405050606070708080909002023030404050506060707080809090NCS DIGITAL ATLAS 1950Colour AccuracyIgnorance about colour, lack of better solutions etc. all combineto turn the choice and control of colour into a costly venture.Many of the different Colour Sample Collections on the marketare being far from consistent. Often a colour may vary a greatdeal from one print to the next, which leads to miscommunicationand the loss in marketing value, and the cost for customerclaims are enormous.Research behind the NCS - Natural Color System ®© has led to alogical system for all of the 10 million colours we can perceive.It simplifies colour specification and makes it possible to giveexact notations for any colour. Using NCS, the exact notations,the globally leading colour accuracy and colour consistency onthe NCS colour samples reduce the problem of the unacceptablecolour variations of the past.High colour accuracy is essential, if we desire a perfect colourappearance in the final product - the colour appearance ourcustomers expect.How to Recognize Qualityand Colour AccuracyThe visual appearance, i.e. how the colour looks tothe eye, is the most important way to judge colour.However, industry often uses measured colour values,received from a spectrophotometer, to controlthe colour of the standard and the match.The instrumental values are calculated into aΔE (CMC 1:1)(Delta E) value. ”E” is supposed toindicate the composite picture of the total colourdifference (summation of the differences in lightness,chroma and hue). Ideally, the ΔE (CMC 1:1)is aperceptual indication of the size of the visual colourdifference between two colours. It is the best meansof technical assessment known today.405060708090203040506005102030405060708090WS05 10 20-R90BCalibratedMatching Standard∆E(CMC 1:1) 0,3-0,5NCS primary standardTolerance for production ofNCS colour samplesC405060708090203040506005102030405060708090WS05 10 20-R90BIndustry Commercial Match∆E(CMC 1:1) ~ 1,0In paint, bulding trade etc. 1,0 isa common accepted toleranceIllustratates the deviation to differentdirectionsCThe Delta E scale starts at 0, where ΔE (CMC 1:1)= 0stands for no perceived difference at all. AtΔE (CMC 1:1)= 0,3 the difference starts to becomevisible. In most printed sample collections only 20% of the colour samples attain ΔE (CMC 1:1)= 2, theremaining 80% is even worse, ΔE (CMC 1:1)= 2-20.NCS has managed to diminish the unacceptablecolour variations of the past, reaching almostzero, ΔE (CMC 1:1)= 0,3. Thanks to the NCS QualityManagement colour tolerances are steadily beingreduced. Do not forget, the human eye is still themost effective way to evaluate the visualappearance of a colour.405060708090203040506005102030405060708090WS05 10 20-R90BTextile Samples∆E(CMC 1:1) 2 - 5Common deviation fortextile samplesWith deviations to all directionsthe result can be very different fromthe standardC405060708090203040506005102030405060708090WS05 10 20-R90BPrinted Standard∆E(CMC 1:1) ~ 2 - 20Common deviation on printedstandardsPossible deviations if fragileprinted standards are usedPossible deviations basedon Printed StandardCNatural Color System ®© - The international language of colour communicationNCS - Natural Color System ®© , the NCS ®© notations and NCS ®© products are the property of the Scandinavian Colour Institute AB, Stockholm ©SCI 2007.68