CN109470298B - Method for defining classes of printing stocks - Google Patents
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- CN109470298B CN109470298B CN201811218435.8A CN201811218435A CN109470298B CN 109470298 B CN109470298 B CN 109470298B CN 201811218435 A CN201811218435 A CN 201811218435A CN 109470298 B CN109470298 B CN 109470298B
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Abstract
The invention provides a method for classifying and defining printing stocks, which comprises the following steps: testing the performance of the printing stock; classifying the printing stock according to the performance test result of the printing stock and a classification strategy; the classification result is defined according to the performance test result of the printing stock, the properties of the printing stock are classified according to the performance test result of the printing stock, and the classified printing stock is further defined according to the performance test result, so that the classification method is comprehensive and objective, the quality of printed matters can be greatly improved, the hue problem of the printing stock is considered, and the problem that the printing colors of enterprises are not matched when color management is carried out is solved.
Description
Technical Field
The invention relates to the technical field of printing, in particular to a method for classifying and defining printing stocks.
Background
The printing material is various substances which can accept ink or adsorb pigments and present pictures and texts. The printing material includes paper printing, plastic printing, metal printing, ceramic printing, and wall printing according to the classification. The printing stock paper includes newsprint, embossed paper, gravure paper, newspaper, blueprint paper, copy paper, dictionary paper, book cover paper, writing paper, white cardboard, offset paper, offset printing coating paper and other various materials. The substrate classifications within the existing industry are mainly Coated and Uncoated. In order to improve the quality of printed matters, the best printing effect of the printing stock is printed according to the matching of the printing stock with the corresponding printing standard, and the color gamut, the ink receptivity, the glossiness, the roughness and the hue in the control elements are indispensable printing stock classification elements.
In the prior art, ISO12647-2 classifies printing stocks into two major categories, namely Coated and Uncoated, most of the industries classify the printing stocks by using ISO classification methods, the ISO classification methods are distinguished according to the coating condition of the paper surface, and the existing classification methods have the following problems: the ISO classification method mainly depends on subjective judgment of individuals, and is narrow, without data and standard. Meanwhile, according to the classification method in the existing industry, all printing stock types cannot be completely covered, the problems of wrong classification of the printing stocks and the like are easily caused, the standard mismatch phenomenon is caused, and the printed matter cannot present a good printing effect. In addition, at present, the classification of the printing material only lies in the coating condition of the surface of the printing material, and the hue problem of the printing material is not considered, so that the problem that the printing color is not matched when enterprises perform color management is easily caused. Currently, in the industry, including the ISO standard, there is a classification of substrates, but this classification is not comprehensive and there is no systematic, objective, and data classification method.
Therefore, in order to improve the quality of printed products and provide a more comprehensive, systematic and standard method for classifying printing materials in the industry, it is necessary to provide a comprehensive and high-quality method for defining and classifying printing materials.
Disclosure of Invention
Embodiments of the present invention provide a method for substrate classification definition to solve the above problems.
In order to achieve the purpose, the invention adopts the following technical scheme.
A method of substrate categorization definition, comprising:
testing the performance of the printing stock;
classifying the printing stock according to the performance test result of the printing stock and a classification strategy;
defining the result of the classification according to the performance test result of the printing stock.
Further, the testing the performance of the substrate includes: and carrying out roughness test, glossiness test, permeability test, facula test and printing stock Lab measurement on the printing stock.
Further, the classifying the printing stock according to the performance test result of the printing stock and the classification strategy includes: and dividing the printing stock into non-coated paper, special paper and coated paper according to the roughness test value R, the glossiness test value G, the permeability test value S and the facula test value M of the printing stock.
Further, defining the result of the classification according to the result of the performance test of the substrate comprises:
defining the non-coated paper as non-coated-offset type, non-coated-Monken type and non-coated-ultra yellow type according to the Lab measured value b of the printing stock and the classification result; defining the special paper into special paper-high white type, special paper-natural white type and special paper-beige type; the coated papers are defined as coating-white and coating-yellow.
Further, the method for classifying the printing stock into non-coated paper, special paper and coated paper according to the roughness test value R, the glossiness test value G, the permeability test value S and the facula test value M of the printing stock specifically comprises the following steps:
when the roughness test value R of the substrate is greater than a first roughness threshold value R1; or the printing stock roughness test value R is less than or equal to a first roughness threshold value R1, and the permeability test value S of the printing stock is less than or equal to a first permeability threshold value S1, the printing stock is classified as non-coated paper;
when the roughness test value R of the printing stock is less than or equal to a first roughness threshold value R1, the permeability test value S of the printing stock is greater than a first permeability threshold value S1, and S is less than or equal to a second permeability threshold value S2(S2 is greater than S1); or the roughness test value R of the printing stock is less than or equal to the first roughness threshold value R1, the permeability test value S is more than the second permeability threshold value S2, and the glossiness test value G is less than or equal to the first glossiness threshold value G1; or the printing stock roughness test value R is less than or equal to a first threshold roughness value R1, the permeability test value S is more than a second permeability threshold value S2, the glossiness test value G is more than a first glossiness threshold value G1, and the light spot index test value M is more than or equal to a first light spot index threshold value M1, the printing stock is classified as special paper;
and when the roughness test value R of the printing stock is less than or equal to a first roughness threshold value R1, the permeability test value S is greater than a second permeability threshold value S2, the glossiness test value G is greater than a first glossiness threshold value G1, and the spot index test value M is less than a first spot index threshold value M1, classifying the printing stock as coated paper.
Further, the defining of the non-coated paper into non-coated-offset type, non-coated-Monken type and non-coated-ultra yellow type according to the Lab measurement value b of the printing material and the classification result specifically comprises:
defining the non-coated paper as non-coated-offset type when the Lab measurement b < first Lab threshold b1 for the non-coated paper;
defining the non-coated paper as non-coated-Monken when the Lab measurement b of the non-coated paper is greater than or equal to a first Lab threshold b1 and the Lab measurement b < a second Lab threshold b2(b1 < b 2);
defining the non-coated paper as non-coated-super yellow when the Lab measurement b of the non-coated paper is greater than or equal to a second Lab threshold b 2;
according to the Lab measured value b of the printing stock and the classification result, the special paper is defined into special paper-high white class, special paper-natural white class and special paper-beige class, and the method specifically comprises the following steps:
when the Lab measured value b of the specialty paper is less than the third Lab threshold value b3, defining the specialty paper as specialty paper-high white class;
when the Lab measured value b of the specialty paper is larger than or equal to the third Lab threshold value b3 and the Lab measured value b is smaller than the fourth Lab threshold value b4(b3 is smaller than b4), defining the specialty paper as specialty paper-natural white class;
when the Lab measured value b of the specialty paper is larger than or equal to a fourth Lab threshold value b4, defining the specialty paper as a specialty paper-beige color class;
defining the coated paper into a coating-white class and a coating-yellow class according to the Lab measured value b of the printing stock and the classification result, and specifically comprising the following steps of:
defining the coated paper as coating-white when the Lab measurement b < fifth Lab threshold b5 for the coated paper;
when the Lab measurement b of the coated paper is greater than or equal to the fifth Lab threshold b5, the coated paper is defined as coating-yellow.
Further, the first roughness threshold R1 is 4, the first permeability threshold S1 is 60, the second permeability threshold S2 is 95, the first glossiness threshold G1 is 27, and the first flare index threshold M1 is 260.
Further, the first Lab threshold b1 is-1, the second Lab threshold b2 is 5, the third Lab threshold b3 is 0, the fourth Lab threshold b4 is 5, and the fifth Lab threshold b5 is-3.
According to the technical scheme provided by the invention, the method for classifying and defining the printing stocks can more comprehensively and objectively reflect the properties of the printing stocks by classifying the performance test results of the printing stocks, so that the quality of printed matters is further improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only one embodiment of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a flow chart of a method for substrate classification definition according to an embodiment of the present invention;
fig. 2 is a process flow diagram of a method for substrate classification definition according to an embodiment of the present invention.
Reference numerals:
classifying rules of non-coated paper; II, special paper classification rules; (iii) coated paper classification rules
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
For the convenience of understanding of the embodiments of the present invention, the following description is further explained by taking the drawings as examples, and the embodiments do not limit the embodiments of the present invention.
The method for classifying and defining the printing stocks, provided by the embodiment of the invention, aims to classify and define the printing stocks according to the performance test results of the printing stocks so as to solve the problem that the existing method for classifying the printing stocks is not comprehensive and unobtrusive.
Examples
Fig. 1 is a flowchart of a method for defining substrate categories according to an embodiment of the present invention, and referring to fig. 1, the method for defining substrate categories according to the embodiment of the present invention includes:
s1, testing the performance of the printing stock;
s2, classifying the printing stocks according to the performance test results of the printing stocks and a classification strategy;
s3 defining the result of the classification according to the performance test result of the printing stock.
Preferably, the performance test comprises: roughness test, gloss test, permeability test, light spot test and substrate Lab measurement.
The specific test process is as follows:
and (3) roughness testing: on a printability tester, a drop of ink (accurate amount) is dropped between two paper strips, an ink mark is milled at a speed of 0.3-0.5S, and the ink can fill the pit part on the surface of a printing stock. Measuring the inked area of the substrate, calculating the roughness of the substrate in terms of inked area per square meter, test conditions: printing pressure: 1000N; printing speed: 3 m/s; test liquid amount: 1% blue ink prepared with water, 5mm3。
And (3) testing the glossiness: the color is developed using a printability tester at a set speed and pressure using a quantitative standard gloss ink. After the sample sheet is dried, measuring the glossiness of the sample sheet by using a glossiness meter, wherein the testing conditions are as follows: printing pressure: 625N; printing speed: 0.2 m/s; test liquid amount: red standard gloss ink, 2.4 μm.
And (3) permeability test: a drop of ink (5.8 mg. + -. 0.3mg) was dropped between the printing plate of the printability tester and the strip of paper held on the fan wheel, which rotated to roll out a trace. The ink absorption of the printing stock is determined by the length of an ink mark formed by rolling one drop of ink on the surface of the printing stock under certain pressure and speed. The longer the ink trace indicates the lower the ink receptivity of the substrate, the inverse of the ink trace length is finally used to indicate the print penetration of the substrate, test conditions: printing pressure: 1000N; printing speed: 1.25 m/s; test liquid amount: prepared with dibutyl phthalate into 1% Sudan red ink, one drop, 5.8mg + -0.3 mg.
Testing light spots: printing stock by using a printability tester, scanning a printed sample by using a high-precision scanner, and finally calculating the uneven degree of printing on the surface of the printed stock by using image analysis software, namely a light spot index, wherein the test conditions are as follows: printing pressure: 500N; printing speed: 0.2 m/s; test liquid amount: test ink, 8 μm.
Lab measurement: lab is a solid color model, L represents luminance, a represents the range from magenta to green, and b represents the range from yellow to blue. Measuring the Lab value of the printing stock by using the Lab measuring function of a spectrophotometer, wherein the test conditions are as follows: spectrophotometer, 0/45, D50, 2 degree field of view, T response, -LP, white background; lab measurement function or density + Lab measurement function.
Preferably, the printing stock is divided into non-coated paper, special paper and coated paper according to the roughness test value R, the glossiness test value G, the permeability test value S and the facula test value M of the printing stock.
In particular, when the roughness test value R of the substrate > a first roughness threshold value R1; or the printing stock roughness test value R is less than or equal to a first roughness threshold value R1, and the permeability test value S of the printing stock is less than or equal to a first permeability threshold value S1, the printing stock is classified as non-coated paper;
when the roughness test value R of the printing stock is less than or equal to a first roughness threshold value R1, the permeability test value S of the printing stock is greater than a first permeability threshold value S1, and S is less than or equal to a second permeability threshold value S2(S2 is greater than S1); or the roughness test value R of the printing stock is less than or equal to the first roughness threshold value R1, the permeability test value S is more than the second permeability threshold value S2, and the glossiness test value G is less than or equal to the first glossiness threshold value G1; or the printing stock roughness test value R is less than or equal to a first threshold roughness value R1, the permeability test value S is more than a second permeability threshold value S2, the glossiness test value G is more than a first glossiness threshold value G1, and the light spot index test value M is more than or equal to a first light spot index threshold value M1, the printing stock is classified as special paper;
and when the roughness test value R of the printing stock is less than or equal to a first roughness threshold value R1, the permeability test value S is greater than a second permeability threshold value S2, the glossiness test value G is greater than a first glossiness threshold value G1, and the spot index test value M is less than a first spot index threshold value M1, classifying the printing stock as coated paper.
Preferably, the first roughness threshold R1 is 4, the first permeability threshold S1 is 60, the second permeability threshold S2 is 95, the first glossiness threshold G1 is 27, the first spot index threshold M1 is 260:
fig. 2 is a process flow diagram of a method for substrate classification definition according to an embodiment of the present invention, and fig. 2 is a flowchart:
when the roughness of the printing stock is more than 4, namely R is more than 4, the printing stock is classified as non-coated paper;
when the roughness of the printing stock is less than or equal to 4 and the permeability is less than or equal to 60, namely R is less than or equal to 4 and S is less than or equal to 60, the printing stock is classified as non-coated paper.
When the roughness of the printing stock is less than or equal to 4, the permeability is more than 60 and less than or equal to 95, namely R is less than or equal to 4 and S is more than 60 and less than or equal to 95, the printing stock is classified as special paper;
when the roughness of the printing stock is less than or equal to 4, the permeability is greater than 95, and the glossiness is less than or equal to 27, namely R is less than or equal to 4, S is greater than 95, and G is less than or equal to 27, the printing stock is classified as special paper;
when the roughness of the printing stock is less than or equal to 4, the permeability is greater than 95, the glossiness is greater than 27, and the facula index is greater than or equal to 260, namely R is less than or equal to 4, S is greater than 95, G is greater than 27, and M is greater than or equal to 260, the printing stock is classified as special paper.
When the roughness of the printing stock is less than or equal to 4, the permeability is greater than 95, the glossiness is greater than 27, and the facula index is less than 260, namely R is less than or equal to 4, S is greater than 95, G is greater than 27, and M is less than 260, the printing stock is classified as coated paper.
Preferably, the non-coated paper is defined as non-coated-offset type, non-coated-Monken type and non-coated-ultra yellow type according to the Lab measurement value b of the printing material and the classification result; defining the special paper into special paper-high white type, special paper-natural white type and special paper-beige type; the coated papers are defined as coating-white and coating-yellow.
Specifically, the defining of the non-coated paper into non-coating-offset type, non-coating-Monken type and non-coating-ultra yellow type according to the Lab measurement value b of the printing stock and the classification result specifically comprises:
defining the non-coated paper as non-coated-offset type when the Lab measurement b < first Lab threshold b1 for the non-coated paper;
defining the non-coated paper as non-coated-Monken when the Lab measurement b of the non-coated paper is greater than or equal to a first Lab threshold b1 and the Lab measurement b < a second Lab threshold b2(b2 > b 1);
defining the non-coated paper as non-coated-super yellow when the Lab measurement b of the non-coated paper is greater than or equal to a second Lab threshold b 2;
according to the Lab measured value b of the printing stock and the classification result, the special paper is defined into special paper-high white class, special paper-natural white class and special paper-beige class, and the method specifically comprises the following steps:
when the Lab measured value b of the specialty paper is less than the third Lab threshold value b3, defining the specialty paper as specialty paper-high white class;
when the Lab measured value b of the specialty paper is larger than or equal to the third Lab threshold value b3 and the Lab measured value b is smaller than the fourth Lab threshold value b4(b4 is larger than b3), defining the specialty paper as specialty paper-natural white class;
when the Lab measured value b of the specialty paper is larger than or equal to a fourth Lab threshold value b4, defining the specialty paper as a specialty paper-beige color class;
defining the coated paper into a coating-white class and a coating-yellow class according to the Lab measured value b of the printing stock and the classification result, and specifically comprising the following steps of:
defining the coated paper as coating-white when the Lab measurement b < fifth Lab threshold b5 for the coated paper;
when the Lab measurement b of the coated paper is greater than or equal to the fifth Lab threshold b5, the coated paper is defined as coating-yellow.
Preferably, the first Lab threshold b1 is-1, the second Lab threshold b2 is 5, the third Lab threshold b3 is 0, the fourth Lab threshold b4 is 5, the fifth Lab threshold b5 is-3:
FIG. 2 is a process flow diagram of a method for substrate classification definition according to an embodiment of the present invention, referring to FIG. 2, when the substrate is a non-coated paper, and the b value of the non-coated paper is less than-1, i.e. b < -1, the substrate is classified as a non-coated-offset type;
when the printing stock is non-coated paper, the b value of the non-coated paper is more than or equal to-1 and less than 5, namely b is more than or equal to-1 and less than 5, the printing stock is classified as non-coated-Monken;
when the b value of the non-coated paper is more than or equal to 5, namely b is more than or equal to 5, the printing stock is classified as non-coated-super yellow.
When the printing stock is the special paper, the b value of the special paper is less than 0, namely b is less than 0, the printing stock is classified as the special paper-high white;
when the printing stock is the special paper, the b value of the special paper is more than or equal to 0 and less than 5, namely b is more than or equal to 0 and less than 5, the printing stock is classified as the special paper-unbleached;
when the printing stock is the special paper, the b value of the special paper is more than or equal to 5, namely b is more than or equal to 5, the printing stock is classified as the special paper-beige.
When the printing stock is coated paper, the b value of the coated paper is less than-3, namely b is less than-3, the printing stock is classified as coating-white;
when the printing stock is coated paper, the b value of the coated paper is more than or equal to-3, namely b is more than or equal to-3, the printing stock is classified as coating-yellow.
Those skilled in the art should understand that the above-mentioned application types of the input box are only examples, and other existing or future application types of the input box, such as those applicable to the embodiments of the present invention, should be included in the scope of the present invention and are also included herein by reference.
In summary, according to the method for classifying and defining the printing stocks, the performance test is performed on the printing stocks, the properties of the printing stocks are classified according to the performance test results, and the classified printing stocks are further defined according to the performance test results.
Those of ordinary skill in the art will understand that: the drawings are merely schematic representations of one embodiment, and the flow charts in the drawings are not necessarily required to practice the present invention.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (4)
1. A method of substrate categorization definition, comprising:
testing the performance of a substrate, comprising: carrying out roughness test, glossiness test, permeability test, light spot test and printed material Lab measurement on the printed material;
classifying the printing stock according to the performance test result of the printing stock and a classification strategy, wherein the classification comprises the following steps: according to the roughness test value R, the glossiness test value G, the permeability test value S and the facula test value M of the printing stock, the printing stock is divided into non-coated paper, special paper and coated paper, and the method specifically comprises the following steps:
when the roughness test value R of the substrate is greater than a first roughness threshold value R1; or the printing stock roughness test value R is less than or equal to a first roughness threshold value R1, and the permeability test value S of the printing stock is less than or equal to a first permeability threshold value S1, the printing stock is classified as non-coated paper;
when the roughness test value R of the printing stock is less than or equal to a first roughness threshold value R1, the permeability test value S of the printing stock is greater than a first permeability threshold value S1, and S is less than or equal to a second permeability threshold value S2(S2 is greater than S1); or the roughness test value R of the printing stock is less than or equal to the first roughness threshold value R1, the permeability test value S is more than the second permeability threshold value S2, and the glossiness test value G is less than or equal to the first glossiness threshold value G1; or the printing stock roughness test value R is less than or equal to a first threshold roughness value R1, the permeability test value S is more than a second permeability threshold value S2, the glossiness test value G is more than a first glossiness threshold value G1, and the light spot index test value M is more than or equal to a first light spot index threshold value M1, the printing stock is classified as special paper;
when the roughness test value R of the printing stock is less than or equal to a first roughness threshold value R1, the permeability test value S is greater than a second permeability threshold value S2, the glossiness test value G is greater than a first glossiness threshold value G1, and the light spot index test value M is less than a first light spot index threshold value M1, classifying the printing stock as coated paper;
defining results of the classification according to performance test results of the substrate, comprising:
defining the non-coated paper as non-coated-offset type, non-coated-Monken type and non-coated-ultra yellow type according to the Lab measured value b of the printing stock and the classification result; defining the special paper into special paper-high white type, special paper-natural white type and special paper-beige type; the coated papers are defined as coating-white and coating-yellow.
2. The method of claim 1,
defining the non-coated paper into a non-coating-offset class, a non-coating-Monken class and a non-coating-ultra yellow class according to the Lab measured value b of the printing stock and the classification result, and specifically comprising the following steps of:
defining the non-coated paper as non-coated-offset type when the Lab measurement b < first Lab threshold b1 for the non-coated paper;
defining the non-coated paper as non-coated-Monken when the Lab measurement b of the non-coated paper is greater than or equal to a first Lab threshold b1 and the Lab measurement b < a second Lab threshold b2(b1 < b 2);
defining the non-coated paper as non-coated-super yellow when the Lab measurement b of the non-coated paper is greater than or equal to a second Lab threshold b 2;
according to the Lab measured value b of the printing stock and the classification result, the special paper is defined into special paper-high white class, special paper-natural white class and special paper-beige class, and the method specifically comprises the following steps:
when the Lab measured value b of the specialty paper is less than the third Lab threshold value b3, defining the specialty paper as specialty paper-high white class;
when the Lab measured value b of the specialty paper is larger than or equal to the third Lab threshold value b3 and the Lab measured value b is smaller than the fourth Lab threshold value b4(b3 is smaller than b4), defining the specialty paper as specialty paper-natural white class;
when the Lab measured value b of the specialty paper is larger than or equal to a fourth Lab threshold value b4, defining the specialty paper as a specialty paper-beige color class;
defining the coated paper into a coating-white class and a coating-yellow class according to the Lab measured value b of the printing stock and the classification result, and specifically comprising the following steps of:
defining the coated paper as coating-white when the Lab measurement b < fifth Lab threshold b5 for the coated paper;
when the Lab measurement b of the coated paper is greater than or equal to the fifth Lab threshold b5, the coated paper is defined as coating-yellow.
3. The method as claimed in claim 1, wherein the first roughness threshold R1 is 4, the first permeability threshold S1 is 60, the second permeability threshold S2 is 95, the first gloss threshold G1 is 27, and the first spot index threshold M1 is 260.
4. The method as claimed in claim 2, wherein the first Lab threshold b 1-1, the second Lab threshold b 2-5, the third Lab threshold b 3-0, the fourth Lab threshold b 4-5, and the fifth Lab threshold b 5-3.
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