CN104199624B - Primary inks ink method for determination of amount in a kind of spot color formula - Google Patents

Abstract

The embodiment of the invention relates to the field of light industrial food, and discloses a method for determining the amount of primary color ink in a spot color formula. Wherein, the method includes: making color samples under different conditions of ink consumption of primary color inks, measuring the lightness of the color samples and calculating the chroma of the color samples; drawing the ink consumption of the primary color inks, the color samples The relationship curve between the lightness of the color sample and the chroma of the color sample; according to the change trend of the chroma of the color sample in the relationship graph and the lightness of the color sample with the amount of ink used in the primary color ink , to determine the optimal ink consumption of the primary color ink. The implementation of the embodiments of the present invention can solve the problem of a large amount of waste of primary color ink in the existing spot color preparation process.

Description

A method for determining the amount of primary color ink in a spot color formula

technical field

The invention relates to the field of light industrial food, in particular to a method for determining the amount of primary color ink in a spot color formula.

Background technique

With the continuous increase of the types of items, the packaging of the items is gradually becoming diversified. In the process of packaging diversification, the contribution of packaging printing cannot be ignored. Spot colors are widely used in packaging and printing. At present, the method of preparing spot colors is mainly that spot color formulators rely on years of experience in spot color formulas to judge the amount of ink used in each primary color ink by vision. In this way of preparing spot colors In the method, there is no unified standard for the ink consumption of each primary color ink, and the randomness is relatively large. Since the spot color formulator cannot guarantee to accurately grasp the ink consumption of each primary color ink at one time, this method of preparing spot colors is likely to cause a large amount of waste. Duplicate work, resulting in a lot of waste of primary color ink.

Contents of the invention

The embodiment of the present invention provides a method for determining the ink volume of the primary color ink in the spot color formula, which is used to solve the problem of a large amount of waste of the primary color ink in the existing spot color preparation process.

An embodiment of the present invention provides a method for determining the amount of primary color ink in a spot color formula, including:

Making color samples under different conditions of ink consumption of primary color inks, measuring the lightness of the color samples and the chroma of the color samples, and calculating the chroma of the color samples;

Draw the graph of the relationship between the amount of ink used in the primary color ink, the lightness of the color sample and the chroma of the color sample;

According to the change trend of the chroma of the color sample and the lightness of the color sample in the relationship graph with the change of the ink consumption of the primary color ink, the optimal ink consumption of the primary color ink is determined.

In the above-mentioned technical scheme, at first make the color sample under the situation of different ink amounts of primary color ink, measure the lightness of described color sample and the chromaticity of described color sample, and calculate the saturation of described color sample; Then draw described The graph of the relationship between the amount of ink used in primary color ink, the lightness of the color sample and the chroma of the color sample; finally according to the chroma of the color sample in the graph of the relationship and the lightness of the color sample The change trend of the ink consumption of the primary color ink determines the optimal ink consumption of the primary color ink. The technical solution is to determine the point in the relationship graph at which the chroma change trend is obviously slowed down; and the primary color ink corresponding to the point in the relationship graph where the saturation change trend is obviously slow The amount of ink used is the best amount of ink used; because it is easy to determine the ink amount of the primary color ink corresponding to the point where the chroma change trend is obviously slowed down from the relationship graph; thus solving the existing spot color preparation In the process, the amount of primary color ink used is judged by experience. The problem of a large amount of waste of primary color ink.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic flow chart of a method for determining the amount of primary color ink in a spot color formula provided by an embodiment of the present invention;

Fig. 2 is the relationship curve diagram of the chroma of the color sample drawn according to Table 1, the lightness of the color sample with the change of the primary color ink folding resistance four-color red NZSR ink quantity according to the embodiment of the present invention;

Fig. 3 is the relationship curve diagram of the chroma of the color sample drawn according to Table 2, the lightness of the color sample according to the change of primary color ink folding resistance four-color yellow NZSY ink volume (ml) according to the embodiment of the present invention;

Fig. 4 is the relationship curve diagram of the chroma of the color sample drawn according to Table 3, the lightness of the color sample according to the variation of primary color ink folding resistance four-color blue NZSB ink volume (ml) according to the embodiment of the present invention;

Fig. 5 is the relationship curve diagram of the chroma of the color sample drawn according to the embodiment of the present invention, the lightness of the color sample with the change of primary color ink ultramarine blue QC ink volume (ml) according to Table 4;

Fig. 6 is the relationship curve diagram of the chroma of the color sample drawn according to the embodiment of the present invention according to Table 5, the lightness of the color sample with the ink volume (ml) of the primary color ink folding-resistant golden red NZJR;

Fig. 7 is a graph showing the relationship between the chroma and the lightness of the color sample according to Table 6 according to the embodiment of the present invention and the variation of the folding resistance of the primary color ink and the four-color black NZSK ink volume (ml).

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

In the embodiment of the present invention, a method for determining the amount of primary color ink in a spot color formula is provided, which is used to solve the problem of a large amount of waste of primary color ink when judging the amount of primary color ink based on experience in the existing spot color preparation process; the following Each will be described in detail.

Please refer to FIG. 1 . FIG. 1 is a method for determining the amount of primary color ink in a spot color formula disclosed in an embodiment of the present invention. As shown in Figure 1, it includes the following steps:

101. Make color samples with different ink amounts of primary color inks, measure the lightness of the color samples and the chroma of the color samples, and calculate the chroma of the color samples.

Optionally, when making a color sample, first take 0.06ml, 0.07ml, 0.08ml, 0.09ml, 0.10ml, 0.11ml, 0.12ml, 0.15ml, 0.20ml of each primary color ink respectively; Emboss a color strip on a color development instrument or other color development equipment; if the primary color ink is a UV ink, put the color strip made of UV ink on a UV dryer and dry it with ultraviolet rays; thereby obtain a corresponding color sample.

Optionally, the lightness of the color sample and the chromaticity of the color sample can be measured using a spectrophotometer.

Optionally, the formula for calculating the chroma of the color sample is Wherein, the a ^* represents the chromaticity of the color sample along the X-axis direction, and the b ^* represents the chromaticity of the color sample along the Y-axis direction.

102. Draw a graph of the relationship between the ink consumption of the primary color ink, the lightness of the color sample, and the chroma of the color sample.

Optionally, the abscissa in the figure represents the ink volume of the primary color ink, the black solid point in the ordinate represents the lightness of the color sample, and the black square represents the chroma of the color sample.

103. Determine the optimal ink consumption of the primary color ink according to the change trend of the chroma of the color sample and the lightness of the color sample in the relationship graph with the ink consumption of the primary color ink.

Optionally, the optimal ink consumption of the primary color ink is determined according to the change trend of the chroma of the color sample and the lightness of the color sample in the relationship graph with the variation of the ink consumption of the primary color ink. The specific operation is to firstly determine the point in the relationship graph at which the chroma change trend of the color sample is obviously slowed down; The ink consumption of primary color ink is the optimal ink consumption. The point at which the change trend of the chroma of the color sample is obviously slowed down is the ink consumption of the primary color ink corresponding to the maximum chroma of the color sample; before the maximum chroma of the color sample is reached, the chroma varies with The increase of the ink volume of the primary color ink is relatively large; after reaching the maximum chroma of the color sample, the increase of the chroma is small or even begins to decrease with the increase of the ink volume of the primary color ink.

In the above-mentioned technical scheme, at first make the color sample under the situation of different ink amounts of primary color ink, measure the lightness of described color sample and the chromaticity of described color sample, and calculate the saturation of described color sample; Then draw described The graph of the relationship between the amount of ink used in primary color ink, the lightness of the color sample and the chroma of the color sample; finally according to the chroma of the color sample in the graph of the relationship and the lightness of the color sample The change trend of the ink consumption of the primary color ink determines the optimal ink consumption of the primary color ink. The technical solution is to determine the point in the relationship graph where the change trend of the chroma is obviously slowed down; The amount of ink is the best amount of ink used; because it is easy to determine the ink amount of the primary color ink corresponding to the point where the chroma change trend is obviously slowed down from the relationship graph; thus solving the existing spot color preparation process The problem of a large amount of waste of primary color ink when judging the amount of primary color ink ink by experience.

Fig. 2 is a graph showing the relationship between the chroma and lightness of the color sample drawn in Table 1 according to the variation of the folding resistance of the primary color ink and the amount of four-color red NZSR ink according to the embodiment of the present invention.

Table 1

Optionally, Table 1 is the relevant data of the recorded color sample, wherein, the amount of ink represents the ink amount of the primary color ink, L ^* represents the lightness of the color sample, a ^* represents the chromaticity of the color sample in the X-axis direction, b ^* indicates the chroma of the color sample in the Y-axis direction, C indicates the chroma of the color sample, and its calculation formula is

Optionally, the abscissa in FIG. 2 represents the ink volume of the primary color ink, the black solid point in the ordinate represents the lightness of the color sample, and the black square represents the chroma of the color sample.

Optionally, it can be analyzed from Fig. 2 that before the ink volume of the primary color ink is 0.15ml, the chroma of the color sample increases with the increase of the ink volume of the primary color ink, and the increase range is relatively large. The lightness of the sample is continuously decreasing with the increase of the amount of the primary color ink, and the magnitude of the decrease is large; after the amount of the primary color ink is 0.15ml, the chroma of the color sample increases with the amount of the primary color ink. The amount increases, but the increase is very small; therefore, when the amount of primary color ink is 0.15ml, the chroma value corresponding to the chroma increase slows down. When the ink volume of the primary color ink is 0.15ml, the chroma of the primary color four-color red NZSR has reached the maximum value. If the ink volume of the primary color ink continues to increase, the chroma of the color sample will only increase slightly. Excessive reduction of brightness, in order to avoid ink waste, the maximum ink volume of the folding-resistant four-color red NZSR cannot exceed 0.15ml; therefore, the best ink volume of the folding-resistant four-color red NZSR is 0.15ml.

Fig. 3 is the relationship curve diagram of the chroma of the color sample drawn according to Table 2, the lightness of the color sample according to the change of primary color ink folding resistance four-color yellow NZSY ink volume (ml) according to the embodiment of the present invention;

Ink volume(ml) 0.06 0.07 0.08 0.09 0.1 0.12 0.15 0.2 L ^* 90.23 90.63 90.23 90.48 90.03 89.85 89.62 89 a ^* -4.05 -4.46 -3.7 -2.03 -2.34 -0.51 0.75 2.93 b ^* 114.85 115.68 116.09 117.83 118.31 120.91 122.06 123.19 Chroma C 114.92 115.76 116.14 117.84 118.33 120.91 122.06 123.22

Table 2

Optionally, Table 2 is the relevant data of the recorded color sample, wherein, the amount of ink represents the ink amount of the primary color ink, L ^* represents the lightness of the color sample, a ^* represents the chromaticity of the color sample in the X-axis direction, b ^* indicates the chroma of the color sample in the Y-axis direction, C indicates the chroma of the color sample, and its calculation formula is

Optionally, the abscissa in FIG. 3 represents the ink volume of the primary color ink, the black solid point in the ordinate represents the lightness of the color sample, and the black square represents the chroma of the color sample.

Optionally, it can be analyzed from Fig. 3 that before the ink volume of the primary color ink is 0.15ml, the chroma of the color sample increases with the increase of the ink volume of the primary color ink, and the increase rate is relatively large. The lightness of the sample is continuously decreasing with the increase of the amount of the primary color ink, and the magnitude of the decrease is large; after the amount of the primary color ink is 0.15ml, the chroma of the color sample increases with the amount of the primary color ink. The amount increases, but the increase is very small; therefore, when the amount of primary color ink is 0.15ml, the chroma value corresponding to the said chroma increase slows down. When the ink volume of the primary color ink is 0.15ml, the chroma of the color sample has reached the maximum value. If the ink volume of the primary color ink continues to increase, the chroma of the color sample will only increase very little, and the brightness will only be reduced excessively. To avoid ink waste, the maximum ink volume of the folding-resistant four-color yellow NZSY cannot exceed 0.15ml; therefore, the best ink volume of the folding-resistant four-color yellow NZSY is 0.15ml.

4 is a graph showing the relationship between the chroma of the color sample and the lightness of the color sample according to Table 3 according to the embodiment of the present invention, and the variation of the folding resistance of the primary color ink and the four-color blue NZSB ink volume (ml).

Ink volume(ml) 0.06 0.07 0.08 0.09 0.10 0.12 0.15 0.20 L ^* 59.79 41.88 39.18 36.03 34.22 32.92 31.63 31.12 a ^* -29.21 -24.99 -22.7 -20.03 -24.21 -19.23 -18.62 -17.61 b ^* -40.87 -53.12 -57.67 -59.15 -57.93 -59.85 -59.66 -59.12 Chroma C 50.23 58.70 61.97 62.44 62.78 62.86 62.49 61.68

table 3

Optionally, Table 3 is the relevant data of the recorded color sample, wherein, the amount of ink represents the ink amount of the primary color ink, L ^* represents the lightness of the color sample, a ^* represents the chromaticity of the color sample in the X-axis direction, b ^* indicates the chroma of the color sample in the Y-axis direction, C indicates the chroma of the color sample, and its calculation formula is

Optionally, the abscissa in FIG. 4 represents the ink volume of the primary color ink, the black solid point in the ordinate represents the lightness of the color sample, and the black square represents the chroma of the color sample.

Optionally, it can be analyzed from Fig. 4 that before the ink volume of the primary color ink is 0.12ml, the chroma of the color sample increases with the increase of the ink volume of the primary color ink, and the increase range is relatively large. The lightness of the sample is continuously decreasing with the increase of the amount of the primary color ink, and the magnitude of the decrease is large; after the amount of the primary color ink is 0.12ml, the chroma of the color sample increases with the ink consumption of the primary color ink The amount increases and increases, but the increase is very small; therefore, when the amount of primary color ink is 0.12ml, the chroma value corresponding to the chroma increase slows down. When the ink volume of the primary color ink is 0.12ml, the chroma of the primary color four-color blue NZSB has reached the maximum value. If the ink volume of the primary color ink continues to increase, the chroma of the color sample will only increase slightly. Excessive reduction of brightness, in order to avoid ink waste, the maximum ink volume of the folding-resistant four-color blue NZSB cannot exceed 0.12ml; therefore, the optimal ink volume of the folding-resistant four-color blue NZSB is 0.12ml.

5 is a graph showing the relationship between the chroma of the color sample and the lightness of the color sample as a function of the ink volume (ml) of the primary color ink ultramarine blue QC drawn according to Table 4 according to the embodiment of the present invention.

Ink volume(ml) 0.06 0.07 0.08 0.09 0.10 0.12 0.15 0.20 L ^* 31.67 27.44 23.87 22.23 20.47 18.08 15.76 12.95 a ^* 20.74 26.81 33.14 35.74 40.19 43.73 46.48 47.35 b ^* -73.92 -77.28 -79.73 -79.63 -80.95 -79.94 -78.19 -73.79 Chroma C 76.77 81.79 86.34 87.28 90.37 91.11 90.96 87.67

Table 4

Optionally, Table 4 is the relevant data of the recorded color sample, wherein, the amount of ink represents the ink amount of the primary color ink, L ^* represents the lightness of the color sample, a ^* represents the chromaticity of the color sample in the X-axis direction, b ^* indicates the chroma of the color sample in the Y-axis direction, C indicates the chroma of the color sample, and its calculation formula is

Optionally, the abscissa in FIG. 5 represents the ink volume of the primary color ink, the black solid point in the ordinate represents the lightness of the color sample, and the black square represents the chroma of the color sample.

Optionally, it can be analyzed from Fig. 5 that before the ink volume of the primary color ink is 0.15ml, the chroma of the color sample increases with the increase of the ink volume of the primary color ink, and the increase range is relatively large. The lightness of the sample is continuously decreasing with the increase of the amount of the primary color ink, and the magnitude of the decrease is large; after the amount of the primary color ink is 0.15ml, the chroma of the color sample increases with the amount of the primary color ink. The amount increases, but the increase is very small; therefore, when the amount of primary color ink is 0.15ml, the chroma value corresponding to the chroma increase slows down. When the ink volume of the primary color ink is 0.15ml, the chroma of the primary color ultramarine blue QC has reached the maximum value. If the ink volume of the primary color ink continues to be increased, the chroma of the color sample will only increase very little, and the brightness will only be excessively reduced. In order to avoid ink waste, the maximum ink volume of Ultramarine QC cannot exceed 0.15ml; therefore, the optimal ink volume of Ultramarine QC is 0.15ml.

Fig. 6 is a graph showing the relationship between the chroma and lightness of the color sample drawn according to Table 5 as a function of the ink volume (ml) of the primary color ink Folding Gold Red NZJR according to the embodiment of the present invention.

Ink volume(ml) 0.06 0.07 0.08 0.09 0.100 0.12 0.15 0.20 L ^* 64.08 57.7 53.93 54.02 53.03 51.73 50.62 48.49 a ^* 60.97 70.64 75.5 74.87 76.03 77.13 77.69 78.06 b ^* 38.16 55.78 70.87 69.14 72.93 77.71 79.41 78.02 Chroma C 71.92 90.00 103.55 101.91 105.35 109.48 111.09 110.36

table 5

Optionally, Table 5 is the relevant data of the recorded color sample, wherein, the amount of ink represents the ink amount of the primary color ink, L ^* represents the lightness of the color sample, a ^* represents the chromaticity of the color sample in the X-axis direction, b ^* indicates the chroma of the color sample in the Y-axis direction, C indicates the chroma of the color sample, and its calculation formula is

Optionally, the abscissa in FIG. 6 represents the ink volume of the primary color ink, the black solid point in the ordinate represents the lightness of the color sample, and the black square represents the chroma of the color sample.

Optionally, it can be analyzed from Fig. 6 that before the ink volume of the primary color ink is 0.12ml, the chroma of the color sample increases with the increase of the ink volume of the primary color ink, and the increase range is relatively large. The lightness of the sample is continuously decreasing with the increase of the amount of the primary color ink, and the magnitude of the decrease is large; after the amount of the primary color ink is 0.12ml, the chroma of the color sample increases with the ink consumption of the primary color ink The amount increases and increases, but the increase is very small; therefore, when the amount of primary color ink is 0.12ml, the chroma value corresponding to the chroma increase slows down. When the amount of the primary color ink is 0.12ml, the chroma of the primary color gold red NZJR has reached the maximum value. If the amount of the primary color ink continues to increase, the chroma of the color sample will only increase too much. To reduce brightness, in order to avoid ink waste, the maximum ink volume of Folding Gold Red NZJR cannot exceed 0.12ml; therefore, the best ink volume of Folding Gold Red NZJR is 0.12ml.

Fig. 7 is a graph showing the relationship between the chroma and the lightness of the color sample according to Table 6 according to the embodiment of the present invention and the variation of the folding resistance of the primary color ink and the four-color black NZSK ink volume (ml).

Ink volume(ml) 0.06 0.07 0.08 0.09 0.10 0.12 0.15 0.20 L ^* 21.4 9.41 7.23 4.9 4.34 4.24 4.14 4.56 a ^* -0.64 -0.53 -0.7 -0.67 -0.5 -0.74 -0.74 -0.6 b ^* -0.40 -0.38 -0.46 -0.46 -0.33 -0.31 -0.39 -0.53 Chroma C 0.75 0.65 0.83 0.81 0.59 0.80 0.83 0.80

Table 6

Optionally, Table 6 is the relevant data of the recorded color sample, wherein, the amount of ink represents the ink amount of the primary color ink, L ^* represents the lightness of the color sample, a ^* represents the chromaticity of the color sample in the X-axis direction, b ^* Indicates the chromaticity of the color sample in the Y-axis direction C indicates the chromaticity of the color sample, and its calculation formula is

Optionally, the abscissa in FIG. 7 represents the ink volume of the primary color ink, the black solid point in the ordinate represents the lightness of the color sample, and the black square represents the chroma of the color sample.

Optionally, it can be analyzed from Figure 7 that the chroma of the folding-resistant four-color black NZSK is very small, almost close to 0, and the change trend of its chroma is not obvious, because the folding-resistant four-color black NZSK is a kind of Black ink, the chroma of black ink is almost 0; so when the prepared spot color is black ink, when we reduce its brightness to a stable value, the ink volume of the corresponding primary color ink is the optimal ink volume; from Figure 7 we can see The best ink consumption for folding four-color black NZSK is 0.1ml.

The method provided by the embodiment of the present invention has been introduced in detail above, and the principle and implementation mode of the present invention have been explained by using specific examples in this article. The description of the above embodiment is only used to help understand the method of the present invention and its core idea At the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be construed as limiting the present invention.

Claims (3)

1. primary inks ink method for determination of amount in a kind of spot color formula, which is characterized in that including：

The tinctorial pattern being produced under primary inks ink amount different situations, measures the lightness of the tinctorial pattern and the color of the tinctorial pattern Degree, and calculate the chroma of the tinctorial pattern；

Draw the graph of relation between the chroma of the primary inks ink amount, the lightness of the tinctorial pattern and the tinctorial pattern；

According to the chroma of tinctorial pattern described in the graph of relation and the lightness of the tinctorial pattern with the black quantitative change of the primary inks The variation tendency of change determines the best with ink amount of primary inks described in tinctorial pattern；

It is described according to the chroma of tinctorial pattern described in the graph of relation and the lightness of the tinctorial pattern with the use of the primary inks The variation tendency of ink amount variation determines that the best of primary inks described in tinctorial pattern includes with ink amount：

The point that the chroma variation tendency of the tinctorial pattern obviously slows down is determined in the graph of relation；

The use for the corresponding primary inks of point that the chroma variation tendency of tinctorial pattern described in the graph of relation obviously slows down Ink amount uses ink amount to make the best of the primary inks；

When drawing the graph of relation primary colors with ink amount be respectively 0.06ml, 0.07ml, 0.08ml, 0.09ml, 0.10ml、0.11ml、0.12ml、0.15ml、0.20ml；

Wherein, the optimal ink ink amount of the red NZSR of four color of folding is 0.15ml；The optimal ink ink amount of four color Huang NZSY of folding is 0.15ml；The optimal ink ink amount of four color indigo plant NZSB of folding is 0.12ml；The optimal ink ink amount of ultramarine QC is 0.15ml；Folding The optimal ink ink amount of golden red NZJR is 0.12ml；Best measured with ink of the black NZSK of four color of folding is 0.1ml.

2. according to the method described in claim 1, it is characterized in that, further including：

It is measured according to the lightness of the tinctorial pattern, the chroma of the tinctorial pattern and the primary inks ink during preparing the tinctorial pattern Between relationship establish corresponding color database.

3. according to the method described in claim 1, it is characterized in that, further including：

It is foundation with best measured with ink of the primary inks, determines that the best of spot color uses ink amount, the spot color is by the original Color ink is prepared.