CN117972131A - White plastic color matching database establishment method, system, device and storage medium - Google Patents
White plastic color matching database establishment method, system, device and storage medium Download PDFInfo
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- 239000004033 plastic Substances 0.000 title claims abstract description 108
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000003860 storage Methods 0.000 title claims abstract description 9
- 150000001875 compounds Chemical class 0.000 claims abstract description 45
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 125
- 235000010215 titanium dioxide Nutrition 0.000 claims description 67
- 239000004408 titanium dioxide Substances 0.000 claims description 58
- 239000002994 raw material Substances 0.000 claims description 50
- 239000000843 powder Substances 0.000 claims description 32
- 239000003086 colorant Substances 0.000 claims description 15
- 238000004590 computer program Methods 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 230000002087 whitening effect Effects 0.000 claims description 6
- 238000013329 compounding Methods 0.000 claims description 4
- 238000007405 data analysis Methods 0.000 claims description 3
- 238000013500 data storage Methods 0.000 claims description 3
- 239000001038 titanium pigment Substances 0.000 claims 1
- 239000003973 paint Substances 0.000 description 5
- 238000007726 management method Methods 0.000 description 4
- XOFYZVNMUHMLCC-ZPOLXVRWSA-N prednisone Chemical compound O=C1C=C[C@]2(C)[C@H]3C(=O)C[C@](C)([C@@](CC4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1 XOFYZVNMUHMLCC-ZPOLXVRWSA-N 0.000 description 4
- 238000005282 brightening Methods 0.000 description 2
- 238000004422 calculation algorithm Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004595 color masterbatch Substances 0.000 description 1
- 238000012258 culturing Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention discloses a method, a system, a device and a storage medium for establishing a white plastic color matching database, which comprise the following steps: (1) Establishing white plastic color matching ground color data, wherein the ground color data comprises sample formula data and a value, b value and L value data corresponding to the sample formula data; (2) Dividing the underlying color data into a bright-dark area and a hue deviation area, dividing the bright-dark area into four groups of bright-dark color groups, and dividing the hue deviation area into a red group, a yellow group and a blue group; (3) Taking any one of the bright and dark color groups of the bright and dark area, and combining the sample formula data of one or more groups of the red group, the yellow group and the blue group of the hue deflection area to obtain compound color sample formula data; (4) And measuring the a value, the b value and the L value of the color plate sampled by the color measuring instrument, obtaining the a value, the b value and the L value data corresponding to the compound color sample formula data, and storing the data in a database to obtain the white plastic color matching database.
Description
Technical Field
The invention relates to the field of plastic color master batch manufacturing, in particular to a method, a system, a device and a storage medium for establishing a white plastic color matching database.
Background
In the field of plastic color matching, two color matching methods are most adopted at present, one is to carry out visual color matching through experience by a color matching master, and the other is to carry out color matching by means of an instrument. Wherein, five problems exist in visual color matching, 1, time problem: a great deal of time is consumed for culturing the color master; 2. efficiency problem: the color matching is carried out by the color matching master with abundant experience, more than 10 times of adjustment are needed to prepare similar colors, and the efficiency is low; 3. precision problem: the accuracy of manual preparation is low; 4. raw material consumption problem: in the process of continuously adjusting the formula, a large amount of raw materials are consumed for plate punching; 5. management problems: the loss and the lead amount of raw materials are subjectively declared by staff, which is unfavorable for unified management. The method for matching colors by means of instruments is the most widely used method at present, and mainly comprises the steps of measuring a color difference delta E of a sample by a color measuring instrument, comparing the measured value with a standard color to find the color closest to the color of the sample, and adjusting the standard color formula to obtain the color of the sample. The method needs to prepare a large number of basic color plates and store the color values of the basic color plates into a computer so as to obtain the standard color similar to the sample color more quickly, and therefore, a large amount of raw materials are also needed to be consumed for building the standard color database, and the method is time-consuming and labor-consuming. In addition, a certain amount of standard color values are acquired, and then a computer algorithm is utilized to automatically compound the formulas, so that formulas of a large number of color samples are obtained, and then when the incoming color values are acquired in a later period, the formulas corresponding to the incoming color values can be acquired rapidly, so that the color matching efficiency is improved. The plastic raw material has color and is not transparent, the glossiness and thickness of the surface of the plastic product are different, the color accuracy can be influenced, the color meter is invented, the bottom layer calculation method is used for matching the color of paint, the base color and thickness of the paint are different from those of plastic, the shading degree is different, the surface of the plastic is complex, the surface problems are not considered, the paint color is not applicable to other fields with high-precision color matching, the paint can only be used as an auxiliary tool, the base layer of the paint is transparent and thin, the color meter is used for measuring the color, the light cannot be influenced, and therefore, the color meter is simply used for collecting the color of the plastic, and the accuracy of the color matching result of the plastic can be influenced.
Therefore, development of a color matching database and a color matching method capable of improving color matching efficiency, reducing raw material loss, improving color matching accuracy and facilitating unified management is urgently needed, and the color matching problem in the current plastic field is solved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a method, a system, a device and a storage medium for establishing a white plastic color matching database, which solve the problems of low color matching efficiency, high raw material loss, low color matching precision, inconvenience for unified management, time and labor waste and high loss of a computer caused by acquiring standard color plate values through a color meter after a large number of standard color plates are required to be prepared for auxiliary color matching of the existing instrument.
The technical scheme adopted by the invention for achieving the purpose is as follows:
The method for establishing the white plastic color matching database comprises the following steps:
(1) Establishing bottom color data of a white plastic sample, wherein the bottom color data comprises sample formula data and a value, b value and L value data corresponding to the sample formula data;
(2) Dividing the underlying color data into a bright-dark area and a hue deviation area, dividing the bright-dark area into four groups of bright-dark color groups, and dividing the hue deviation area into a red group, a yellow group and a blue group;
(3) Taking any one of the bright and dark color groups of the bright and dark area, and combining the sample formula data of one or more groups of the red group, the yellow group and the blue group of the hue deflection area to obtain compound color sample formula data;
(4) Establishing a plastic color matching shading degree database, dividing the plastic color matching shading degree database into six titanium dioxide degrees according to the non-shading, semi-shading and full shading and the corresponding amount of titanium dioxide added according to the set weight raw materials, and then adjusting the shading range of the six titanium dioxide degrees by adding black powder to obtain a plurality of different shading degree samples, wherein the non-shading is defined as one titanium dioxide degree, the semi-shading is defined as three titanium dioxide degrees, and the full shading is defined as two titanium dioxide degrees;
(5) And (3) respectively performing color board proofing according to the formula data corresponding to the plurality of samples with different shading degrees in the step (4), measuring the a value, the b value and the L value of the proofing color board by a color meter, obtaining the a value, the b value and the L value data corresponding to the formula data of the compound color sample, obtaining a plurality of groups of white plastic sample sets with different shading degrees, and storing the white plastic sample sets in a database to obtain a white plastic color matching database.
The step (2) specifically comprises the following steps:
(2.1) dividing the bottom color data into a bright and dark area and a hue deviation area according to the brightness and hue of the white plastic;
(2.2) dividing the bright and dark areas into four bright and dark color groups according to the primary colors of the plastic raw materials, whether black powder is added or not and whether titanium dioxide is added or not;
(2.3) dividing the hue deflection region into a red group, a yellow group and a blue group according to three primary colors, and then dividing the hue deflection region into six groups of hue deflection color groups according to the characteristic that each primary color has hue deflection to the other two primary colors;
And (2.4) biasing the four groups of bright and dark color groups and the six groups of hues towards the color groups, dividing each group into color samples with different shades including an upper limit value, a lower limit value and at least one intermediate value of the group of shades according to the shade range, wherein the color samples are the color values of the bottom layer of the white plastic color matching database, and the sample formula data corresponding to the color values of the bottom layer of the white plastic color matching database and the data of the a value, the b value and the L value corresponding to the sample formula data are the bottom color data of the white plastic color matching.
Step (2.3) the six hue-bias color groups include: the red component is divided into a red-yellow group and a red-blue group, the yellow component is divided into a yellow-red group and a yellow-blue group, and the blue component is divided into a blue-red group and a blue-yellow group.
And (2.2) the four bright-dark color sets comprise a white primary color set, a plastic raw material and whitening agent set, a plastic raw material and black powder set, and a plastic raw material and black powder and whitening agent set.
The step (3) specifically comprises: and taking one color sample in any one bright and dark color group of the bright and dark area, and combining the sample formula data of one color sample in one or more groups of red, yellow and blue groups of the hue deflection area to obtain the compound color sample formula data.
The method further comprises the steps of (6) mutually combining multiple groups of compound color sample formula data, combining multiple groups of compound color sample formula data with bottom color sample formula data to obtain new compound color sample formula data, performing color plate proofing on the obtained new compound color sample formula data, measuring an a value, a b value and an L value of the proofing color plate through a color meter, storing the new compound color sample formula data and the obtained new compound color sample formula data corresponding to the a value, the b value and the L value data in a database, and expanding the white plastic color matching database obtained in the step (5).
The six titanium dioxide degrees in the step (4) specifically comprise: the titanium white degree of the non-shading sample is that 80g of titanium white is added into every 25 kg of raw materials; the three titanium dioxide degrees of the semi-shading sample are respectively 200g titanium dioxide added into every 25 kg of raw materials, 500g titanium dioxide added into every 25 kg of raw materials and 800g titanium dioxide added into every 25 kg of raw materials; the two titanium dioxide degrees of the full shading sample are 1600g titanium dioxide added into every 25 kg of raw materials, and 2500g titanium dioxide is added into every 25 kg of raw materials.
A system for implementing the method, comprising:
the bottom color data establishing module is used for establishing bottom color data of white plastic color matching;
the data classification module is used for dividing the bottom color data into a bright-dark area and a hue deviation area, dividing the bright-dark area into four groups of bright-dark color groups, and dividing the hue deviation area into a red group, a yellow group and a blue group;
the data compounding module is used for combining the sample formula data to obtain compound color sample formula data;
The data analysis and storage module is used for acquiring the data of the value a, the value b and the value L corresponding to the compound color sample formula data and storing the data in the database.
A white plastic color database creation device, comprising:
a memory for storing a computer program;
And the processor is used for realizing the steps of the white plastic color matching database establishment method when storing the computer program.
A computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the white plastic color database building method.
The beneficial effects of the invention are as follows: the white plastic color matching database is obtained by utilizing the characteristic that three primary colors have bias towards other two colors, adding the influence of titanium white powder and black powder on the brightness of the colors, establishing the bottom color, then combining the formulas of the bottom color, and then proofing, and obtaining the color sample color value after proofing. Compared with a method for carrying out formula calculation compounding through a computer algorithm, the method can greatly improve the accuracy of color matching.
When the white plastic color matching database is used, the value a, the value b, the value L and the value delta E of a plastic sample are measured through a color measuring instrument, then 4-10 color sample color values closest to the delta E value of the plastic sample are searched in the white plastic color matching database, then the plastic sample is compared with a color plate of the found color sample under D65 lamplight, a color sample N 1 closest to the color is found, the color sample closest to the color is compared with the color of the plastic sample, the brightness and the color bias of the color sample are compared, then one or more color samples N 2 or N 2、……Nn with the brightness or the color bias are obtained from the color sample closest to the delta E value or the database, and then the formulas of N 1 and N 2 … … are combined according to a certain proportion, so that the color of the plastic sample is obtained rapidly. Therefore, the white plastic database can greatly reduce the number of times of color board proofing, thereby greatly improving the color matching efficiency, reducing the color matching cost and greatly improving the color matching precision.
Drawings
FIG. 1 is a flow chart of database creation according to the present invention;
FIG. 2 is a schematic view of the underlying color distribution of the present invention.
Detailed Description
Examples: referring to fig. 1 to 2, the present embodiment provides a method for creating a white plastic color database, which includes the following steps:
(1) Establishing bottom color data of a white plastic sample, wherein the bottom color data comprises sample formula data and a value, b value and L value data corresponding to the sample formula data;
(2) Dividing the underlying color data into a bright-dark area and a hue deviation area, dividing the bright-dark area into four groups of bright-dark color groups, and dividing the hue deviation area into a red group, a yellow group and a blue group;
(3) Taking any one of the bright and dark color groups of the bright and dark area, and combining the sample formula data of one or more groups of the red group, the yellow group and the blue group of the hue deflection area to obtain compound color sample formula data;
(4) Establishing a plastic color matching shading degree database, dividing the plastic color matching shading degree database into six titanium dioxide degrees according to the non-shading, semi-shading and full shading and the corresponding amount of titanium dioxide added according to the set weight raw materials, and then adjusting the shading range of the six titanium dioxide degrees by adding black powder to obtain a plurality of different shading degree samples, wherein the non-shading is defined as one titanium dioxide degree, the semi-shading is defined as three titanium dioxide degrees, and the full shading is defined as two titanium dioxide degrees;
(5) And (3) respectively performing color board proofing according to the formula data corresponding to the plurality of samples with different shading degrees in the step (4), measuring the a value, the b value and the L value of the proofing color board by a color meter, obtaining the a value, the b value and the L value data corresponding to the formula data of the compound color sample, obtaining a plurality of groups of white plastic sample sets with different shading degrees, and storing the white plastic sample sets in a database to obtain a white plastic color matching database.
The step (2) specifically comprises the following steps:
(2.1) dividing the bottom color data into a bright and dark area and a hue deviation area according to the brightness and hue of the white plastic;
(2.2) dividing the bright and dark areas into four bright and dark color groups according to the primary colors of the plastic raw materials, whether black powder is added or not and whether titanium dioxide is added or not;
(2.3) dividing the hue deflection region into a red group, a yellow group and a blue group according to three primary colors, and then dividing the hue deflection region into six groups of hue deflection color groups according to the characteristic that each primary color has hue deflection to the other two primary colors;
And (2.4) biasing the four groups of bright and dark color groups and the six groups of hues towards the color groups, dividing each group into color samples with different shades including an upper limit value, a lower limit value and at least one intermediate value of the group of shades according to the shade range, wherein the color samples are the color values of the bottom layer of the white plastic color matching database, and the sample formula data corresponding to the color values of the bottom layer of the white plastic color matching database and the data of the a value, the b value and the L value corresponding to the sample formula data are the bottom color data of the white plastic color matching.
Step (2.3) the six hue-bias color groups include: the red component is divided into a red-yellow group and a red-blue group, the yellow component is divided into a yellow-red group and a yellow-blue group, and the blue component is divided into a blue-red group and a blue-yellow group.
And (2.2) the four bright-dark color sets comprise a white primary color set, a plastic raw material and whitening agent set, a plastic raw material and black powder set, and a plastic raw material and black powder and whitening agent set.
The specific color sample color values of the six hue-deviation color groups and the four bright-dark color groups are as follows:
The lower limit value color sample L of the white primary color set has a value of 97.99, an a value of-0.46, a b value of 3.51, the upper limit value color sample L has a value of 93.25, an a value of 0.74 and a b value of-3.68; the lower limit value color sample L of the plastic raw material and the brightening agent group is 98.18, the a value is-0.15, the b value is 2.12, the upper limit value color sample L is 94.31, the a value is 0.58, and the b value is-4.45.
The lower limit value color sample L of the plastic raw material black powder adding group is 96.13, the a value is-0.87, the b value is 1.93, the upper limit value color sample L is 89.99, the a value is-1.06, and the b value is-0.99; the lower limit value color sample L of the plastic raw material black powder and the brightening agent group is 96.27, the a value is-0.51, the b value is 0.5, the upper limit value color sample L is 90.26, the a value is 0.35, and the b value is-6.14.
The red-yellowish color sample L has a lower limit value of 97.78, a value of 0.43, b value of 3.35, and an upper limit value of 96.06, a value of 5.8, b value of 1.67; the red-bluish color set has a lower limit color sample L of 97.49, an a of 0.1, a b of 2.73, an upper limit color sample L of 94.52, an a of 3.35, and a b of-1.41.
The lower limit value color sample L of the yellow-biased red group has a value of 97.67, an a value of-0.24, a b value of 4.82, the upper limit value color sample L has a value of 95.13, an a value of 1.51, and a b value of 11.85; the lower limit value color sample L of the yellow-bluish color group has a value of 98.04, an a value of-0.9, a b value of 4.77, the upper limit value color sample L has a value of 97.8, an a value of-2.82, and a b value of 10.28.
The lower limit value color sample L of the blue-bias red group has a value of 95.72, an a value of-1.07, a b value of 0.01, the upper limit value color sample L has a value of 91.82, an a value of-0.91 and a b value of-5.47; the blue-shifted yellow group has a lower limit color sample L of 97.8, an a value of-1.51, a b value of 3.2, an upper limit color sample L of 96.48, an a value of-4.98, and a b value of 1.06.
The step (3) specifically comprises: and taking one color sample in any one bright and dark color group of the bright and dark area, and combining the sample formula data of one color sample in one or more groups of red, yellow and blue groups of the hue deflection area to obtain the compound color sample formula data.
And combining the formulas corresponding to ten groups of bottom colors at least two by two, and dividing the formula consumption of one color value of the group by the quantity of the formulas, if two by two, dividing the formula of each color value by 2, dividing the formula of three groups by 3, and so on, performing color plate proofing on the combined formulas to obtain a compound color sample, and then acquiring and storing the a value, the b value and the L value of a color plate of the new color through a color difference meter to obtain compound color sample formula data, thereby establishing white color matching database data.
The compound color samples can be combined with each other to obtain more compound color samples.
Therefore, the sample data in the white plastic color database of the invention is divided into a first-order plastic color sample, a second-order plastic color sample and a third-order plastic color sample … … according to the compound level, wherein the single plastic sample of the bottom color is the first-order plastic color sample, the plastic sample compounded by the bottom color is the second-order plastic color sample, and the plastic sample compounded by the second-order plastic color sample is the third-order plastic color sample … …
The method further comprises the steps of (6) mutually combining multiple groups of compound color sample formula data, combining multiple groups of compound color sample formula data with bottom color sample formula data to obtain new compound color sample formula data, performing color plate proofing on the obtained new compound color sample formula data, measuring an a value, a b value and an L value of the proofing color plate through a color meter, storing the new compound color sample formula data and the obtained new compound color sample formula data corresponding to the a value, the b value and the L value data in a database, and expanding the white plastic color matching database obtained in the step (5).
The six titanium dioxide degrees in the step (4) specifically comprise: the titanium white degree of the non-shading sample is that 80g of titanium white is added into every 25 kg of raw materials; the three titanium dioxide degrees of the semi-shading sample are respectively 200g titanium dioxide added into every 25 kg of raw materials, 500g titanium dioxide added into every 25 kg of raw materials and 800g titanium dioxide added into every 25 kg of raw materials; the two titanium dioxide degrees of the full shading sample are 1600g titanium dioxide added into every 25 kg of raw materials, and 2500g titanium dioxide is added into every 25 kg of raw materials.
The range value of the black powder added in the step (4) comprises the following steps:
The titanium dioxide is added with 80g of titanium dioxide per 25 kg of raw materials, and the addition amount of the black powder is 0.00028% -0.0104% of the addition amount of the black powder per 25 kg of raw materials.
The addition amount of the black powder in the semi-shading sample added with 200g of titanium dioxide is 0.00028-0.0128% of the raw material per 25 kg, the addition amount of the black powder in the semi-shading sample added with 500g of titanium dioxide is 0.00048-0.002% of the raw material per 25 kg, and the addition amount of the black powder in the semi-shading sample added with 800g of titanium dioxide is 0.00064-0.0032% of the raw material per 25 kg; the half shading degree of the injection product added with 200g of titanium dioxide, 500g of titanium dioxide and 800g of titanium dioxide is half shading of the injection product with the thickness of 1.0-3.0 mm.
1600G of titanium dioxide and 2500g of titanium dioxide are semi-shading samples when no black powder is added.
The addition amount of the black powder in the full-shading sample added with 1600g of titanium dioxide is 0.00096% -0.0056% of the raw material per 25 kg, and the addition amount of the black powder in the full-shading sample added with 2500g of titanium dioxide is 0.00104% -0.0068% of the raw material per 25 kg. The full shading degree of the added 1600g of titanium dioxide is the full shading of the injection molding product with the thickness of 3.0 mm; the total shading degree of the added 2500g titanium dioxide is the total shading of the injection molding product with the thickness of 2.0 mm.
When adding black powder, the black powder is divided into a plurality of sub-samples which at least comprise the lower limit value, the upper limit value and the middle value of the black powder adding amount of each titanium white powder degree sample and are not added with black powder according to the difference of the black powder adding amount of each titanium white powder degree sample. The compound color sample formula data are used for respectively performing color board proofing according to formula data corresponding to a plurality of subsamples with different shade degrees, and measuring the a value, the b value and the L value of the proofing color board through a color meter to obtain a value, the b value and the L value data corresponding to the compound color sample formula data, so as to obtain a plurality of groups of white plastic sample sets with different shade degrees, and storing the white plastic sample sets in a database to obtain a white plastic color matching database.
And carrying out two kinds of combination ratios or three kinds of combination ratios on the subsamples of the non-shading sample, the semi-shading sample and the full-shading sample to obtain a new shading degree sample, respectively carrying out color plate proofing on the formula data of the compound color sample according to the formula data corresponding to the multiple new shading degree samples, measuring the a value, the b value and the L value of the proofing color plate through a color meter to obtain a value a, a b value and L value data corresponding to the formula data of the compound color sample, obtaining a plurality of groups of white plastic sample sets with new shading degree, and storing the white plastic sample sets in a database so as to expand the database.
A system for implementing the method, comprising:
the bottom color data establishing module is used for establishing bottom color data of white plastic color matching;
the data classification module is used for dividing the bottom color data into a bright-dark area and a hue deviation area, dividing the bright-dark area into four groups of bright-dark color groups, and dividing the hue deviation area into a red group, a yellow group and a blue group;
the data compounding module is used for combining the sample formula data to obtain compound color sample formula data;
The data analysis and storage module is used for acquiring the data of the value a, the value b and the value L corresponding to the compound color sample formula data and storing the data in the database.
A white plastic color database creation device, comprising:
a memory for storing a computer program;
And the processor is used for realizing the steps of the white plastic color matching database establishment method when storing the computer program.
A computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the white plastic color database building method.
The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the invention, so that all changes made in the steps of the method according to the present invention are included in the scope of the invention.
Claims (10)
1. The method for establishing the white plastic color matching database is characterized by comprising the following steps:
(1) Establishing bottom color sample data of a white plastic sample, wherein the bottom color sample data comprises sample formula data and a value, b value and L value data corresponding to the sample formula data;
(2) Dividing the formula data of the bottom color sample into a bright-dark area and a hue deviation area, dividing the bright-dark area into four groups of bright-dark color groups, and dividing the hue deviation area into a red group, a yellow group and a blue group;
(3) Taking any one of the bright and dark color groups of the bright and dark area, and combining the sample formula data of one or more groups of the red group, the yellow group and the blue group of the hue deflection area to obtain compound color sample formula data;
(4) Establishing a plastic color matching shading degree database, dividing the plastic color matching shading degree database into six titanium dioxide degrees according to the non-shading, semi-shading and full shading and the corresponding amount of titanium dioxide added according to the set weight raw materials, and then adjusting the shading range of the six titanium dioxide degrees by adding black powder to obtain a plurality of different shading degree samples, wherein the non-shading is defined as one titanium dioxide degree, the semi-shading is defined as three titanium dioxide degrees, and the full shading is defined as two titanium dioxide degrees;
(5) And (3) respectively performing color board proofing according to the formula data corresponding to the plurality of samples with different shading degrees in the step (4), measuring the a value, the b value and the L value of the proofing color board by a color meter, obtaining the a value, the b value and the L value data corresponding to the formula data of the compound color sample, obtaining a plurality of groups of white plastic sample sets with different shading degrees, and storing the white plastic sample sets in a database to obtain a white plastic color matching database.
2. The method for creating a white plastic color matching database according to claim 1, wherein the step (2) specifically comprises the steps of:
(2.1) dividing the bottom color data into a bright and dark area and a hue deviation area according to the brightness and hue of the white plastic;
(2.2) dividing the bright and dark areas into four bright and dark color groups according to the primary colors of the plastic raw materials, whether black powder is added or not and whether titanium dioxide is added or not;
(2.3) dividing the hue deflection region into a red group, a yellow group and a blue group according to three primary colors, and then dividing the hue deflection region into six groups of hue deflection color groups according to the characteristic that each primary color has hue deflection to the other two primary colors;
And (2.4) biasing the four groups of bright and dark color groups and the six groups of hues towards the color groups, dividing each group into color samples with different shades including an upper limit value, a lower limit value and at least one intermediate value of the group of shades according to the shade range, wherein the color samples are the color values of the bottom layer of the white plastic color matching database, and the sample formula data corresponding to the color values of the bottom layer of the white plastic color matching database and the data of the a value, the b value and the L value corresponding to the sample formula data are the bottom color data of the white plastic color matching.
3. The method of claim 2, wherein the six hue-bias color sets of step (2.3) comprise: the red component is divided into a red-yellow group and a red-blue group, the yellow component is divided into a yellow-red group and a yellow-blue group, and the blue component is divided into a blue-red group and a blue-yellow group.
4. The method of claim 3, wherein the four sets of light and dark color sets in step (2.2) include a white primary color set, a plastic raw material plus whitening agent set, a plastic raw material plus black powder set, and a plastic raw material plus black powder and whitening agent set.
5. The method for creating a white plastic color database according to claim 4, wherein the step (3) specifically comprises: and taking one color sample in any one bright and dark color group of the bright and dark area, and combining the sample formula data of one color sample in one or more groups of red, yellow and blue groups of the hue deflection area to obtain the compound color sample formula data.
6. The method for building white plastic color matching database according to claim 1, further comprising the steps of (6) combining the compound color sample formula data with each other in a plurality of groups, combining the compound color sample formula data with the bottom color sample formula data in a plurality of groups to obtain new compound color sample formula data, performing color plate proofing on the obtained new compound color sample formula data, measuring the a value, b value and L value of the printed color plate by a color meter, storing the new compound color sample formula data and the a value, b value and L value data corresponding to the obtained new compound color sample formula data in a database, and expanding the white plastic color matching database obtained in the step (5).
7. The method for creating a white plastic color matching database according to claim 1, wherein the six titanium pigment degrees in the step (4) specifically include: the titanium white degree of the non-shading sample is that 80g of titanium white is added into every 25 kg of raw materials; the three titanium dioxide degrees of the semi-shading sample are respectively 200g titanium dioxide added into every 25 kg of raw materials, 500g titanium dioxide added into every 25 kg of raw materials and 800g titanium dioxide added into every 25 kg of raw materials; the two titanium dioxide degrees of the full shading sample are 1600g titanium dioxide added into every 25 kg of raw materials, and 2500g titanium dioxide is added into every 25 kg of raw materials.
8. A system for carrying out the method according to any one of claims 1 to 7, characterized in that it comprises:
the bottom color data establishing module is used for establishing bottom color data of white plastic color matching;
the data classification module is used for dividing the bottom color data into a bright-dark area and a hue deviation area, dividing the bright-dark area into four groups of bright-dark color groups, and dividing the hue deviation area into a red group, a yellow group and a blue group;
the data compounding module is used for combining the sample formula data to obtain compound color sample formula data;
The data analysis and storage module is used for acquiring the data of the value a, the value b and the value L corresponding to the compound color sample formula data and storing the data in the database.
9. A white plastic color matching database creation device, comprising:
a memory for storing a computer program;
a processor for implementing the steps of the white plastic color database building method of one of claims 1 to 7 when storing a computer program.
10. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the white plastic color database building method according to one of claims 1 to 7.
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