50 Computerized color matching.Even 40 years ago, color matching depended on the trained eye and memory of an experienced technician. Those are still necessary today, but experienced specialists greatly increase their productivity with instruments that measure color numerically plus computer software that draws on pigment and resin databases to suggest formulations that meet color, cost, and other requirements. Communication between color buyers and vendors is improved by relying less on subjective color a false or spurious color seen in some instances, owing to the persistence of the luminous impression upon the retina, and a gradual change of its character, as where a wheel perfectly white, and with a circumference regularly subdivided, is made to revolve rapidly over a dark object, the perception and by transmitting color information electronically instead of transporting color chips. The advent of computerized color matching for plastics was unveiled at NPE NPE NullPointerException (Java) NPE Network Processing Engine NPE National Policy on Education NPE National Plastics Exposition NPE Natural Penis Enlargement NPE Nutrition Program for the Elderly 1968, with the launch of the Comic II digital computer, which verified colors by spectrophotometry spectrophotometry Branch of spectroscopy dealing with measurement of radiant energy transmitted or reflected by a body as a function of wavelength. The measurement is usually compared to that transmitted or reflected by a system that serves as a standard. and was showcased by Kolhnorgen. It was developed in the mid-1960s by Davidson & Hemmendinger in Easton, Pa., which was acquired by Kollmorgen. Comic II integrated a spectrophotometer spectrophotometer, instrument for measuring and comparing the intensities of common spectral lines in the spectra of two different sources of light. See photometry; spectroscope; spectrum. with a desk-sized computer. An operator could output reflectance re·flec·tance n. The ratio of the total amount of radiation, as of light, reflected by a surface to the total amount of radiation incident on the surface. Noun 1. data to a teletype machine, which produced a punched tape Punched tape or paper tape is a largely obsolete form of data storage, consisting of a long strip of paper in which holes are punched to store data. It was widely used during much of the twentieth century for teleprinter communication, and later as a storage medium for . In the 1980s, such behemoths (then called minicomputers) were replaced by PCs. In 1988 Minolta (now Konica Minolta) introduced the first handheld spectrophotometer. The head weighed 2.2 lb and was connected by a cable to a computer/printer unit. The latest portable units today weigh a little over 1 lb. Some are as powerful as any benchtop spectrophotometer. They can read color and gloss in 1.5 sec under 11 light sources, perform color matching and correction, and display numerical and graphical results. |
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