CN107357131A - A kind of method for plate making color separation - Google Patents
A kind of method for plate making color separation Download PDFInfo
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- CN107357131A CN107357131A CN201710492395.5A CN201710492395A CN107357131A CN 107357131 A CN107357131 A CN 107357131A CN 201710492395 A CN201710492395 A CN 201710492395A CN 107357131 A CN107357131 A CN 107357131A
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/0005—Production of optical devices or components in so far as characterised by the lithographic processes or materials used therefor
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Abstract
A kind of method for plate making color separation disclosed by the invention, comprises the following steps：Design 8 color members of Neugebauer equation；Pass through the color member figure of the output for printing standard；Test 8 color member tristimulus values；In generation, is calculated into Neugebauer equation, obtains colour separating model；Color separation color tristimulus values are treated in test；Obtained middle tristimulus values is brought into colour separating model and exports c, m, y values；Output result c, m, y value carry out color separation design.The present invention utilizes Neugebauer equation mechanism, establish color tristimulus values and printed matter color dot area percentage relation, before being printed applied to printing in Color Separate printing stencil making, solve the problems, such as in existing method to be influenceed by operating personnel's subjectivity excessive with ICC color separation workloads, the technological parameter and flow of Color Separate printing stencil making are optimized, improves Color separating accuracy and operating efficiency.
Description
Technical field
The present invention relates to packages printing Color Separate printing stencil making field, more particularly to a kind of method for plate making color separation.
Background technology
With the fast development of packages printing, the precision of print product and the coherence request more and more higher of packages printing.
At the same time in prepress treatment technique, the color-dividing process design for colored original, which just seems, to be even more important.Most divide at present before print
The most frequently used color separation method in color making plate field, it is that veteran operating personnel require according to the color of original copy, according to set
Color separation curve is completed, existing certain subjectivity, while the dependence to people is bigger.With the making of ICC tag files,
Color separation is carried out by ICC color management at present and is increasingly becoming a kind of trend, but has that workload is bigger than normal, and source file is difficult to control
The problem of processed.
The content of the invention
The shortcomings that it is an object of the invention to overcome prior art and deficiency, there is provided a kind of side for plate making color separation
Method.
The purpose of the present invention is realized by following technical scheme：
A kind of method for plate making color separation, comprise the steps of：
Step 1,8 color members of Neugebauer equation are designed；
Step 2, the color member figure of the output for printing standard is passed through；
Step 3,8 color member tristimulus values are tested；
Step 4, in generation, is calculated into Neugebauer equation, obtains colour separating model；
Step 5, color separation color tristimulus values are treated in test；
Step 6, tristimulus values in step 5 is brought into output c, m, y value in step 4 colour separating model；
Step 7, output result c, m, y values carry out color separation design.
In step 1,8 color members, be trichromatic Y, M, C and respectively by Y, M, C equivalent superposition secondary color R, G, B and
Secondary color W, BK of three colors superposition；It is 100% on the spot to design site area percentage.8 colors member is 8 reference colour members, tool
Body is Huang, product, green grass or young crops, red, green, blue, white, black eight color members.
In step 2, the printing, its mode includes hectographic printing, intaglio printing, flexible version printing.
The printing, the technological parameter that it prints are as follows：
When hectographic printing：Pressure is 4~8kg/cm2, and ink uses resin type offset printing ink, ink viscosity 20
~80Pa.S, fountain solution PH are 4.0~6.5；
When intaglio printing：40~60kg/cm2 of squeegee pressure position, ink use volatility printing-ink, and ink viscosity is
25~130S (No. 4)；
When flexible version printing：2~5kg/cm2 of squeegee pressure position, ink water-based printing ink, ink viscosity be 20~
40S (No. 4).
In step 1, the Neugebauer equation is：
Wherein X, Y, Z are the tristimulus values for the color member for treating color separation；X1-X8、Y1-Y8、Z1-Z8Represent respectively it is white, yellow, pinkish red,
Green grass or young crops, red, green, blue, the tristimulus values of black 8 kinds of primary colours；C, m, y are to treat the green grass or young crops of color separation color member, product, the dot area of yellow three colors
Percentage.
In step 4, the colour separating model is based on knob rank fort establishing equation, is specially：
Using MATLAB softwares, solve function pair knob ranks fort equation is called to be solved, its input variable is X, Y, Z, defeated
It is c, m, y to go out variable；
F1=sym (' -61.43*c-45.31*m-19.00*y+34.98*c*m+9.89*c*y+12.91*m*y-9.0 4*
c*m*y+78.85-X')；
F2=sym (' -59.12*c-64.17*m-15.05*y+46.57*c*m+8.47*c*y+13.48*m*y-10. 97*
c*m*y+82.73-Y')；
F3=sym (' -26.74*c-66.96*m-86.42*y+23.73*c*m+26.07*c*y+63.47*m*y-
24.03*c*m*y+93.06-Z')；
[c, m, y]=solve (f1, f2, f3)；
Wherein X, Y, Z are the tristimulus values for treating color separation；C, m, y are the dot area percentage for treating color separation；F1, f2, f3 are
Function dependent variable, s are constant.
The present invention compared with prior art, has the following advantages that and beneficial effect：
The present invention utilizes Neugebauer equation mechanism, establishes color tristimulus values and printed matter color dot area percentage closes
System, before being printed applied to printing in Color Separate printing stencil making, solve in existing method is influenceed to work with ICC color separations by operating personnel's subjectivity
The problem of excessive is measured, optimizes the technological parameter and flow of Color Separate printing stencil making, improves Color separating accuracy and operating efficiency.
Brief description of the drawings
Fig. 1 is a kind of flow chart of method for plate making color separation of the present invention.
Embodiment
With reference to embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are unlimited
In this.
Embodiment 1
A kind of method for plate making color separation, specifically implement according to following steps：
The 8 color members designed in step 1, it is trichromatic Y, M, C and secondary color R, G, B for being superimposed respectively by Y, M, C equivalent
With secondary color W, BK of the superposition of three colors.It is designed as 100% on the spot,
The color member figure of printing standard is exported in step 2.By the typography parameter setting of printing machine into suitable presswork
During be adapted to the optimal processing parameter of printing, the color member figure of printing standard is exported in step 2.By the printer of offset press
For skill parameter setting into the optimal processing parameter of suitable printing, i.e. hectographic printing pressure is 4~8kg/cm2, ink uses resin type
Offset printing ink, ink viscosity are 20~80Pa.S, and fountain solution PH is 4.0~6.5.Squeegee pressure position 40 in intaglio printing~
60kg/cm2, ink uses volatility printing-ink, and ink viscosity is 25~130S (No. 4).Flexible version printing squeegee pressure position 2
~5kg/cm2, ink water-based printing ink, ink viscosity is 20~40S (No. 4).
8 color member tristimulus values are tested in step 3；
Using X-RITE spectrophotometers, state is set using to be tested under 4 ° or 10 ° of viewing conditions.Will test
As a result recorded.
It is specially in step 4：The spectral tristimulus value of tested in step 38 color members is brought into Neugebauer equation,
Dot area percentage corresponding to calculating.And carry out data record.Specifically：Neugebauer equation is：
Wherein X, Y, Z are the tristimulus values for the color member for treating color separation；X1-X8、Y1-Y8、Z1-Z8Represent respectively it is white, yellow, pinkish red,
Green grass or young crops, red, green, blue, the tristimulus values of black 8 kinds of primary colours；C, m, y are to treat the green grass or young crops of color separation color member, product, the dot area of yellow three colors
Percentage.
It is by the MATlab algorithms that tristimulus values is brought into Neugebauer equation：
Using MATLAB softwares, solve function pair aforesaid equations are called to be solved, its input variable is X, Y, Z, defeated
It is c, m, y to go out variable.
F1=sym (' -61.43*c-45.31*m-19.00*y+34.98*c*m+9.89*c*y+12.91*m*y-9.0 4*
c*m*y+78.85-X')；
F2=sym (' -59.12*c-64.17*m-15.05*y+46.57*c*m+8.47*c*y+13.48*m*y-10. 97*
c*m*y+82.73-Y')；
F3=sym (' -26.74*c-66.96*m-86.42*y+23.73*c*m+26.07*c*y+63.47*m*y-
24.03*c*m*y+93.06-Z')；
[c, m, y]=solve (f1, f2, f3)；
Wherein X, Y, Z are the tristimulus values for treating color separation；C, m, y are the dot area percentage for treating color separation；F1, f2, f3 are
Function dependent variable, s are constant.
Step 5, color separation color tristimulus values are treated in test；
Using X-RITE spectrophotometers, state is set using to be tested under 4 ° or 10 ° of viewing conditions.Will test
As a result recorded.
Step 6, tristimulus values in step 5 is brought into step 4 colour separating model and exports c, m, y values,
Step 7, output result c, m, y value carry out color separation design；
The present invention specifically proposes a kind of plate making color separation method.Using Neugebauer equation mechanism, establish color three and pierce
Swash value and printed matter color dot area percentage relation, before being printed applied to printing in Color Separate printing stencil making, solve in existing method
By operating personnel's subjectivity influenceed with ICC color separation workloads it is excessive the problem of, optimize the technological parameter and flow of Color Separate printing stencil making,
Improve Color separating accuracy and operating efficiency.
Embodiment 2
A kind of method for plate making color separation, specifically implement according to following steps：
Step 1,8 color members of Neugebauer equation are designed；In photoshop design and printing trichromatic Y, M, C and point
Not by secondary color R, G, B of the superposition of Y, M, C equivalent and secondary color W, BK of the superposition of three colors.The dot area percentages of 8 colors member are
100%.
Step 2, the color member figure of the output for printing standard is passed through.
This programme is by taking hectographic printing as an example, and from the split four-color presses of Heidelberg CD102, setting squeegee pressure is 5kg/
cm2, paper 157g/m2Art paper.Ink uses the color ink of Japan's resin type hectographic printing four, ink viscosity control 45Pa.s, mistake
100 specimen pages of printing after version is normal.
Step 3,8 color member tristimulus values are tested；
10 specimen pages are extracted respectively from 100 specimen page upper, middle and lowers, three positions, with X-RITE528 spectrophotometers, are set
Use state is to carry out testing 8 color member tristimulus values under 10 ° of viewing conditions.Test result average value is recorded.
Step 4, take in Neugebauer equation and calculated：
The average tristimulus values of the spectrum of tested in step 38 color members is brought into Neugebauer equation, calculated correspondingly
Dot area percentage.And carry out data record.Specifically：Neugebauer equation is：
Wherein X, Y, Z are the tristimulus values for the color member for treating color separation；X1-X8、Y1-Y8、Z1-Z8Represent respectively it is white, yellow, pinkish red,
Green grass or young crops, red, green, blue, the tristimulus values of black 8 kinds of primary colours；C, m, y are to treat the green grass or young crops of color separation color member, product, the dot area of yellow three colors
Percentage.
It is by the MATlab algorithms that tristimulus values is brought into Neugebauer equation：
Using MATLAB softwares, solve function pair aforesaid equations are called to be solved, its input variable is X, Y, Z, defeated
It is c, m, y to go out variable.
F1=sym (' -61.43*c-45.31*m-19.00*y+34.98*c*m+9.89*c*y+12.91*m*y-9.0 4*
c*m*y+78.85-X')；
F2=sym (' -59.12*c-64.17*m-15.05*y+46.57*c*m+8.47*c*y+13.48*m*y-10. 97*
c*m*y+82.73-Y')；
F3=sym (' -26.74*c-66.96*m-86.42*y+23.73*c*m+26.07*c*y+63.47*m*y-
24.03*c*m*y+93.06-Z')；
[c, m, y]=solve (f1, f2, f3)；
Wherein X, Y, Z are the tristimulus values for treating color separation；C, m, y are the dot area percentage for treating color separation；F1, f2, f3 are
Function dependent variable, s are constant.
Step 5, color separation color tristimulus values are treated in test；
Using X-RITE528 spectrophotometers, state is set using to be tested under 10 ° of viewing conditions.Test is tied
Fruit is X=10.06, Y=18.92, Z=6.41.
Step 6, tristimulus values in step 5 is brought into step 4 colour separating model and exports c, m, y values,
c:m:Y=3.3575：0.0913：9.6258；
Step 7, color separation design is carried out according to output result c, m, y values.
Above-described embodiment is the preferable embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any Spirit Essences without departing from the present invention with made under principle change, modification, replacement, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (6)
- A kind of 1. method for plate making color separation, it is characterised in that comprise the steps of：Step 1,8 color members of Neugebauer equation are designed；Step 2, the color member figure of the output for printing standard is passed through；Step 3,8 color member tristimulus values are tested；Step 4, in generation, is calculated into Neugebauer equation, obtains colour separating model；Step 5, color separation color tristimulus values are treated in test；Step 6, tristimulus values in step 5 is brought into output c, m, y value in step 4 colour separating model；Step 7, output result c, m, y values carry out color separation design.
- 2. it is used for the method for plate making color separation according to claim 1, it is characterised in that in step 1,8 color members, For trichromatic Y, M, C and respectively by secondary color R, G, B of the superposition of Y, M, C equivalent and secondary color W, BK of the superposition of three colors；Design site Area percentage is 100% on the spot.
- 3. it is used for the method for plate making color separation according to claim 1, it is characterised in that in step 2, the printing, its Mode includes hectographic printing, intaglio printing, flexible version printing.
- 4. it is used for the method for plate making color separation according to claim 3, it is characterised in that the printing, its work printed Skill parameter is as follows：When hectographic printing：Pressure is 4~8kg/cm2, and ink uses resin type offset printing ink, ink viscosity is 20~ 80Pa.S, fountain solution PH are 4.0~6.5；When intaglio printing：40~60kg/cm2 of squeegee pressure position, ink use volatility printing-ink, and ink viscosity is 25~ 130S；When flexible version printing：2~5kg/cm2 of squeegee pressure position, ink water-based printing ink, ink viscosity are 20~40S.
- 5. it is used for the method for plate making color separation according to claim 1, it is characterised in that in step 1, knob Jie fort side Cheng Wei：<mfenced open = "{" close = ""> <mtable> <mtr> <mtd> <mrow> <mi>X</mi> <mo>=</mo> <msub> <mi>X</mi> <mn>1</mn> </msub> <mo>+</mo> <mrow> <mo>(</mo> <mrow> <msub> <mi>X</mi> <mn>4</mn> </msub> <mo>-</mo> <msub> <mi>X</mi> <mn>1</mn> </msub> </mrow> <mo>)</mo> </mrow> <mo>*</mo> <mi>c</mi> <mo>+</mo> <mrow> <mo>(</mo> <mrow> <msub> <mi>X</mi> <mn>3</mn> </msub> <mo>-</mo> <msub> <mi>X</mi> <mn>1</mn> </msub> </mrow> <mo>)</mo> </mrow> <mo>*</mo> <mi>m</mi> <mo>+</mo> <mrow> <mo>(</mo> <mrow> <msub> <mi>X</mi> <mn>2</mn> </msub> <mo>-</mo> <msub> <mi>X</mi> <mn>1</mn> </msub> </mrow> <mo>)</mo> </mrow> <mo>*</mo> <mi>y</mi> <mo>+</mo> <mrow> <mo>(</mo> <mrow> <msub> <mi>X</mi> <mn>1</mn> </msub> <mo>+</mo> <msub> <mi>X</mi> <mn>5</mn> </msub> <mo>-</mo> <msub> <mi>X</mi> <mn>2</mn> </msub> <mo>-</mo> <msub> <mi>X</mi> <mn>3</mn> </msub> 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</msub> </mrow> <mo>)</mo> </mrow> <mo>*</mo> <mi>m</mi> <mi>y</mi> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <mo>+</mo> <mrow> <mo>(</mo> <mrow> <msub> <mi>Y</mi> <mn>1</mn> </msub> <mo>+</mo> <msub> <mi>Y</mi> <mn>6</mn> </msub> <mo>-</mo> <msub> <mi>Y</mi> <mn>2</mn> </msub> <mo>-</mo> <msub> <mi>Y</mi> <mn>4</mn> </msub> </mrow> <mo>)</mo> </mrow> <mo>*</mo> <mi>c</mi> <mi>y</mi> <mo>+</mo> <mrow> <mo>(</mo> <mrow> <msub> <mi>Y</mi> <mn>1</mn> </msub> <mo>+</mo> <msub> <mi>Y</mi> <mn>7</mn> </msub> <mo>-</mo> <msub> <mi>Y</mi> <mn>3</mn> </msub> <mo>-</mo> <msub> <mi>Y</mi> <mn>4</mn> </msub> </mrow> <mo>)</mo> </mrow> <mo>*</mo> <mi>c</mi> <mi>m</mi> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <mo>+</mo> <mrow> <mo>(</mo> <mrow> <msub> <mi>Y</mi> <mn>2</mn> </msub> <mo>+</mo> <msub> <mi>Y</mi> <mn>3</mn> </msub> <mo>+</mo> <msub> <mi>Y</mi> <mn>4</mn> </msub> <mo>+</mo> <msub> <mi>Y</mi> <mn>8</mn> </msub> <mo>-</mo> <msub> <mi>Y</mi> <mn>1</mn> </msub> <mo>-</mo> <msub> <mi>Y</mi> <mn>5</mn> </msub> <mo>-</mo> <msub> <mi>Y</mi> <mn>6</mn> </msub> <mo>-</mo> <msub> <mi>Y</mi> <mn>7</mn> </msub> </mrow> <mo>)</mo> </mrow> <mo>*</mo> <mi>c</mi> <mi>m</mi> <mi>y</mi> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <mi>Z</mi> <mo>=</mo> <msub> <mi>Z</mi> <mn>1</mn> </msub> <mo>+</mo> <mrow> <mo>(</mo> <mrow> <msub> <mi>Z</mi> <mn>4</mn> </msub> <mo>-</mo> <msub> <mi>Z</mi> <mn>1</mn> </msub> </mrow> <mo>)</mo> </mrow> <mo>*</mo> <mi>c</mi> <mo>+</mo> <mrow> <mo>(</mo> <mrow> <msub> <mi>Z</mi> <mn>3</mn> </msub> <mo>-</mo> <msub> <mi>Z</mi> <mn>1</mn> </msub> </mrow> <mo>)</mo> </mrow> <mo>*</mo> <mi>m</mi> <mo>+</mo> <mrow> <mo>(</mo> <mrow> <msub> <mi>Z</mi> <mn>2</mn> </msub> <mo>-</mo> <msub> <mi>Z</mi> <mn>1</mn> </msub> </mrow> <mo>)</mo> </mrow> <mo>*</mo> <mi>y</mi> <mo>+</mo> <mrow> <mo>(</mo> <mrow> <msub> <mi>Z</mi> <mn>1</mn> </msub> <mo>+</mo> <msub> <mi>Z</mi> <mn>5</mn> </msub> <mo>-</mo> <msub> <mi>Z</mi> <mn>2</mn> </msub> <mo>-</mo> <msub> <mi>Z</mi> <mn>3</mn> </msub> </mrow> <mo>)</mo> </mrow> <mo>*</mo> <mi>m</mi> <mi>y</mi> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <mo>+</mo> <mrow> <mo>(</mo> <mrow> <msub> <mi>Z</mi> <mn>1</mn> </msub> <mo>+</mo> <msub> <mi>Z</mi> <mn>6</mn> </msub> <mo>-</mo> <msub> <mi>Z</mi> <mn>2</mn> </msub> <mo>-</mo> <msub> <mi>Z</mi> <mn>4</mn> </msub> </mrow> <mo>)</mo> </mrow> <mo>*</mo> <mi>c</mi> <mi>y</mi> <mo>+</mo> <mrow> <mo>(</mo> <mrow> <msub> <mi>Z</mi> <mn>1</mn> </msub> <mo>+</mo> <msub> <mi>Z</mi> <mn>7</mn> </msub> <mo>-</mo> <msub> <mi>Z</mi> <mn>3</mn> </msub> <mo>-</mo> <msub> <mi>Z</mi> <mn>4</mn> </msub> </mrow> <mo>)</mo> </mrow> <mo>*</mo> <mi>c</mi> <mi>m</mi> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <mo>+</mo> <mrow> <mo>(</mo> <mrow> <msub> <mi>Z</mi> <mn>2</mn> </msub> <mo>+</mo> <msub> <mi>Z</mi> <mn>3</mn> </msub> <mo>+</mo> <msub> <mi>Z</mi> <mn>4</mn> </msub> <mo>+</mo> <msub> <mi>Z</mi> <mn>8</mn> </msub> <mo>-</mo> <msub> <mi>Z</mi> <mn>1</mn> </msub> <mo>-</mo> <msub> <mi>Z</mi> <mn>5</mn> </msub> <mo>-</mo> <msub> <mi>Z</mi> <mn>6</mn> </msub> <mo>-</mo> <msub> <mi>Z</mi> <mn>7</mn> </msub> </mrow> <mo>)</mo> </mrow> <mo>*</mo> <mi>c</mi> <mi>m</mi> <mi>y</mi> </mrow> </mtd> </mtr> </mtable> </mfenced>Wherein X, Y, Z are the tristimulus values for the color member for treating color separation；X1-X8、Y1-Y8、Z1-Z8Represent respectively it is white, yellow, pinkish red, blue or green, The tristimulus values of red, green, blue, black 8 kinds of primary colours；C, m, y are to treat the green grass or young crops of color separation color member, product, the dot area hundred of yellow three colors Divide ratio.
- 6. it is used for the method for plate making color separation according to claim 5, it is characterised in that in step 4, the colour separating model It is based on knob rank fort establishing equation, is specially：Using MATLAB softwares, solve function pair knob ranks fort equation is called to be solved, its input variable is X, Y, Z, and output becomes Measure as c, m, y；F1=sym (' -61.43*c-45.31*m-19.00*y+34.98*c*m+9.89*c*y+12.91*m*y-9.0 4*c*m*y +78.85-X')；F2=sym (' -59.12*c-64.17*m-15.05*y+46.57*c*m+8.47*c*y+13.48*m*y-10. 97*c*m* y+82.73-Y')；F3=sym (' -26.74*c-66.96*m-86.42*y+23.73*c*m+26.07*c*y+63.47*m*y-24 .03*c* m*y+93.06-Z')；[c, m, y]=solve (f1, f2, f3)；Wherein X, Y, Z are the tristimulus values for treating color separation；C, m, y are the dot area percentage for treating color separation；F1, f2, f3 are function Dependent variable, s are constant.
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Application publication date: 20171117 |