The spectrophotometer measures accurately, guaranteeing to meet more stringent ink tolerance tolerance requirements.
CDR Pigment & Dispersant Manufacturing Company President W* Virtual Card* Mr. Weicklein said: “With spectrophotometer we can read all the data and allow us to carry out more stringent quality control of the pigment production process. Previously we only used raw materials of three primary colors. Mix it together, and then add some complementary coloring agent. It's not a problem to look at it with the naked eye, but it's not desirable to measure it with a spectrophotometer. Now we become smarter because what kind of new instruments are in the hands of publishers Yes, we must follow these new operating standards."
The challenge
There are still many challenges in color matching. For example, products may not be produced in the same place. If the colors are not uniform, the produced products will show different colors.
Mr. Dauns said: “At present, more and more prints are printed at multiple locations according to the delivery needs. Side by side* The two boxes on the shelf may also be printed at different locations. If the box looks different Consumers will think that quality is not stable. If two print shops print, the color measurement instruments used must be highly consistent."
Sometimes colors look the same even under normal lighting, but they look different from another light source. Mr. Good said: “There may be problems with color constancy. Due to the light source, the surface color of the printed matter will be very different. Another problem is the conditional color matching phenomenon. Products printed with different formula inks. Coordinated colors appear under one light source, but they do not appear to be worthy under a different light source. Spectrophotometers can give product color measurement values ​​under different lighting conditions, helping to solve these problems."
When customers print digital proofs, they request the same color, which is not easily discernible.
Mr. Ken Ferguson, Technical Director of Van Son Ink Co., Ltd., said: “Customers hope that the colors appearing on the computer screen can be copied on the printing machine. But on the press, the results are often unsatisfactory. We can adjust to a certain extent. The customer will come up with a carton and request that whatever color the substrate is printed on should remain the same. This is a technology that has a certain amount of creative space."
New color measuring instrument
The new color measurement instrument can measure the color more effectively and display and store the color measurement results.
Mr. Ferguson said: “The color measurement equipment has been greatly developed. The previous color measurement reservoirs are as large as microwave ovens. The color measurement instruments are now portable. The software functions have been greatly improved and we can build on different Accurate recipe database for substrates and light sources."
Mr. Good said: “Hunter Lab specializes in providing quality control solutions to customers, including quality control software and portable colorimetric spectrophotometers.†The MiniScan XE Plus is a spectrum-based portable colorimeter. Hunter Lab also provides customers with opaque paint color matching software.
The Spectraflash 600 CT produced by Datacolor is highly stable and does not suffer from the appearance of the substrate. Microflash is the same type of portable color measurement instrument.
X-Rite provides customers with a variety of color measurement instruments, including the 500-series spectrophotometer. This is the first portable colorimetric instrument equipped with a spectrum engine. The Model 530 spectrophotometer combines the functions of a high-end densitometer, the functionality of an accurate colorimeter, and the function of an efficient spectrophotometer. The Model 530 spectrophotometer measures the spectral density value unique to each color, and then converts the value to an optical density or colorimetric value. The 530 spectrophotometer also features a paper measurement evaluation function.
The 938 spectrophotometer manufactured by X-Rite is a portable spectrophotometer with all the functions of a spectrophotometer, colorimeter and densitometer. The measurement stability is high, and the spectral density value can be accurately measured and converted. For a variety of objective color expressions. The 938 spectrophotometer can be used to check the tristimulus density and dot area as well as spot LAB values. The SP64 spectrophotometer can quickly and accurately measure the relevant color measurement values ​​for rough or glossy substrates.
Mr. Fosko said that Paul N*Gardnefr produced the Spectro Pen colorimeter with a halogen lamp, with a spectrum measurement range of 380nm-720nm and a measurement line spacing of 10nm. The Spectro Pen colorimeter allows the user to compare different color systems (for example, CIELAB, CIEL CH, and Huntefr Lab color systems) and measure the margin of difference. If the user is satisfied with a color, the color can be entered through the scan, Spectro-Pen then out of the LAB value (the value measured Delta Delta sample, the user can set the parameters and database). â€
During the operation of the printing press, the color stability is affected at any time. For this purpose, Colour Valid Ltd. has developed the Colour Valid color control device, which is specifically designed for measuring and monitoring the color stability of the same speed web press.
Mr. Loworth said: “Without stopping the machine, it is only possible to know whether the colors on the substrate are suitable by the on-board color measurement device. The on-board color measurement device can monitor more than 50 color inspection sites per second.
As the printing industry enters the 21st century, consumers will place higher demands on print quality. Ink manufacturers must meet these reasonable demands of consumers by applying new color measurement techniques.
