Computer ink color matching system and the principle of development - ink, paint - silk screen print [aboutcomputer99.blogspot.com]

Computer ink color matching system and the principle of development - ink, paint - silk screen print [aboutcomputer99.blogspot.com]

Question by cats2jlj: Is there a way to make computer ink last longer? I use the draft setting whenever possible but seem to go through ink like crazy, especially black. My printer is HP. Best answer for Is there a way to make computer ink last longer?:

Answer by Tara M
My HP will use all of the colored ink to make black which causes it to run out quickly. I have to take it out and use only the black ink cartridge. Using the draft setting is the best option. There may not be another way to save ink but you can save money with a refill kit.

Answer by My PC Needs TLC
You can change your default settings to draft quality to save about 30 percent of your ink in each job.You can do this by going into the control panel double click the printers. right click on your printer. select properties. There you will be able to select your default settings. Also check here for the most affordable ink: http://www.mypcneedstlc.com/deals/ink.php

[computer ink]

The hue is the impact ink printed one of the key indicators of quality, therefore, the deployment of ink has become an essential pre-press process. The basic principle is based on color color composition and color mixing theory, harmonic manner to pigment metamerism color effect. With computer technology, computers can store large amounts of data, high-speed computing power with the help of color theory can learn a lot of ink on the basis of numerical data and color processing, man-machine dialogue through color, speed, accuracy high, will be introduced into the printing area, color management and quality testing can be more modern.

I. Development and characteristics of computer color matching

1. The development of computer color matching

In industrial countries, and color-related industries such as textile printing and dyeing, dye, pigment, paint manufacturing, plastics processing and printing ink industries coloring widely used color matching system as product development, production, quality control and strong sales tools, a high penetration rate.

For example, the optical instrument of foreign companies in recent years developed klaeng ink formulation software InkFormulation4.0, the software for offset printing, flexo printing, screen printing, rotary gravure industry, precision formulation prepared with automatically generated formula, multi-channel calculation speed, and can quickly prepare low-cost formula, the software window, friendly interface, and a preparation to ensure accurate formula success rate.

The past 10 years, our country have introduced various types of color systems, but few achieve significant benefits. Foreign-developed software based on the characteristics of the processing industry in Europe and America, based on the relative stability of pigment quality; and although the domestic processing industry has its own characteristics, but the pigment stability is relatively poor quality of some, and the current update pigment species , the new substrate in large numbers, and the color matching system available at home and abroad this lack of flexibility to adjust capacity, so the practical application of color matching system difficulties.

Shenyang Institute of Chemical Research from 1984 color matching system, in which thinking style color Chinese software, is the first Chinese color matching software.

Use of the software system, and the total price of domestic machine supporting the entire system of 1 / 3, if imported, and machinery with a total price of imports 1 / 2. The system is now used in more than 70 manufacturers, covering the dyes, dyeing, wool spinning, knitting, paint, ink, rubber, and colored wallpaper and many other related industries. In addition, Xi'an University of Technology developed the use of color density meter and the density of computer on-line computer color matching system for practical application of the convenience and widespread. From the current development trend of view, the computer has become the ink color matching is an important component.

2. The characteristics of computer color matching

(1) can reduce color matching time, reduce costs and improve the efficiency of color.

(2) can be calculated within a short period of time correction formula.

(3) over the past, all with the ink color into the database, need for instant use.

(4) easy to use. (5) revised the calculation of color formulation and color digital display or printed by the computer output, the final color results in digital form into memory.

(6) can be connected to other functional systems. For example: weighing system can be connected, to minimize weighing errors; reproducibility improved, if the process is continuous, can be set in the print materials printing quality monitoring system, when any abnormality occurs, it will immediately downtime, reduce unnecessary waste.

Second, theory and computer color matching system

1.Kubelka-Munk theory and its limitations

KM theories been put forward as early as 1931, but until 1958, began successfully used in textile dyeing and printing industry, printing industry, application of the theory began in the 20th century 70s.

United States, Japan and other countries developed a computer matching system, basically still use this theory.

Theory through a series of KM is derived, given suitable color calculation function and its derivatives form the most simple form: K / S = (1-r) 2/2r

R = K / S +1- [(K / S +1) 2-1] 1 / 2

Type of r representative of the reflectivity wavelength; K for the absorption coefficient, representing the plane in the infinite medium, the proliferation of light incident light, the micro-element thickness of the dielectric layer of light absorption; S is scattering coefficient, representing infinitesimal thickness of the light scattering rate.

So far, computer color matching (CCM) still follow the basic principles of KM theory. For example, the visual spectral matching method, the computer spectroscopy and color, computer color matching approximation algorithms are based on theory-based KM. However, the practical application of KM theory, its calculation and differences often appear between the concrete practice, reasons can be summarized into two factors.

K-M theory is itself under certain assumptions derived.

First, the thickness and color as x, light falls on any of the infinitesimal layer dx, do not consider the interface caused by the reflection, the results will lead to the application of the theory of the color layer is immersed in the same refractive index of the medium, This problem can be reduced in order to ignore the interface of different refractive index of the algorithm, may result in errors.

Second, dx is the color layer thickness x in any one of the infinitesimal level, so that the absorption and scattering coefficients obtained when using the color layer is considered the same uniform, but this assumption is difficult to apply to the extinction or semi-extinction of the oil-based materials.

Third color layer of coloring agent particles are arranged in chaos, so that the light colored layer spread into a diffuse form of particles completely immersed in the spillover effect, resulting in up and down the two channels. However, the actual application, when the particles exist in the form of oil-based thin films, most were arranged in the horizontal direction, it will lead to the destruction of the two-channel flux assumption.

Fourth, in the thin color layer, light scattering was already too late to enter the color layer within the mediation in the dark, a lot of light in scattering before being absorbed into the color layer so the beam is not diffused state, with the result The result appears quite different.

printing ink industry in the description must be considered when stacking effect of light and pigment particles and the interaction of the physical properties of ink. In practice, it should be said that KM theory contains two double constants, respectively, the absorption coefficient K and scattering coefficient S, ink light scattering ability and capacity compared to the scattering matrix can be ignored, and therefore principles of ink coloration is mainly selective absorption of light ink, and ink absorption capacity of the incident light by the ink layer thickness and density of ink. K-M Li

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