CN108519156A - The method for evaluating titanium dioxide color - Google Patents
The method for evaluating titanium dioxide color Download PDFInfo
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- CN108519156A CN108519156A CN201810145487.0A CN201810145487A CN108519156A CN 108519156 A CN108519156 A CN 108519156A CN 201810145487 A CN201810145487 A CN 201810145487A CN 108519156 A CN108519156 A CN 108519156A
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- titanium dioxide
- color
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- standard
- test sample
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 213
- 239000004408 titanium dioxide Substances 0.000 title claims abstract description 105
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000012360 testing method Methods 0.000 claims abstract description 46
- 238000011156 evaluation Methods 0.000 claims abstract description 11
- 230000004075 alteration Effects 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract description 5
- 239000003086 colorant Substances 0.000 abstract description 2
- 235000010215 titanium dioxide Nutrition 0.000 description 79
- 239000000843 powder Substances 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 238000009795 derivation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- 241000790917 Dioxys <bee> Species 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
- G01J2003/467—Colour computing
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Spectrometry And Color Measurement (AREA)
Abstract
The invention discloses the methods of evaluation titanium dioxide color.This method includes：(1) it provides titanium dioxide standard sample and titanium dioxide waits for test sample；(2) it is tested respectively using L*a*b* colour difference meters and obtains titanium dioxide standard sample and titanium dioxide waits for tristimulus values X, Y, Z of test sample；(3) titanium dioxide standard sample and titanium dioxide are waited for that tristimulus values X, Y, Z of test sample are scaled rgb value respectively；(4) titanium dioxide standard sample and titanium dioxide are waited for that the rgb value of test sample inputs computer drawing software and carries out color filling respectively, to obtain standard color block and color lump to be measured；(5) color that titanium dioxide waits for test sample is evaluated according to the color distortion of color lump to be measured and standard color block.This method converts the color measurement value of titanium dioxide to intuitive picture by being combined L*a*b* systems with RGB system, using computer, to realize the intuitive comparison of different titanium dioxide sample colors.
Description
Technical field
The present invention relates to titanium dioxide pigment fields, specifically, the present invention relates to the methods of evaluation titanium dioxide color.
Background technology
Existing titanium dioxide color measurement key index is L*, a*, b*, is based on CIE 1976L*a*b* (CIE LAB).
Wherein, L* values represent brightness, and value is 0 (black)~100 (white).B* and a* represents chromaticity coordinate, wherein a* represent it is red-
Green axis, b* represent yellow-blue axis, their value is 0 to 10.The principle for testing titanium dioxide color is first tested out using color difference meter
Spectral tristimulus value X, Y, Z, then carry out fortran and obtain L*, a*, b* value.General powder pigments especially titanium dioxide (titanium
White powder) mainly carry out the differentiation of color according to these indexs, but it is more in product batches and measured value respectively has difference
In the case of, it is difficult to which which batch color of intuitive judgment is close or can be substituted for each other.
Therefore, the means of existing evaluation titanium dioxide color still have much room for improvement.
Invention content
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, the present invention
One purpose is the method for proposing evaluation titanium dioxide color.This method is by being combined L*a*b* systems with RGB system, profit
It converts the color measurement value of titanium dioxide to intuitive picture with computer, to realize different titanium dioxide sample colors
Intuitive comparison.
In one aspect of the invention, the present invention proposes a kind of method of titanium dioxide color.Reality according to the present invention
Example is applied, this method includes：(1) it provides titanium dioxide standard sample and titanium dioxide waits for test sample；(2) L*a*b* colour difference meters are utilized to distinguish
Test obtains the titanium dioxide standard sample and the titanium dioxide waits for tristimulus values X, Y, Z of test sample；(3) respectively by described two
Titanium oxide standard sample and the titanium dioxide wait for that tristimulus values X, Y, Z of test sample are scaled rgb value；(4) by the titanium dioxide
Standard sample and the titanium dioxide wait for that the rgb value of test sample inputs computer drawing software and carries out color filling respectively, to obtain
Standard color block and color lump to be measured；(5) titanium dioxide is evaluated according to the color distortion of the color lump to be measured and the standard color block
Titanium waits for the color of test sample.
The method of evaluation titanium dioxide color according to the ... of the embodiment of the present invention, is tested respectively first with L*a*b* colour difference meters
It obtains titanium dioxide standard sample and waits for tristimulus values X, Y, Z of test sample, recycle formula that X, Y, Z value measured is scaled RGB
Value by obtained titanium dioxide standard sample and waits for that test sample rgb value inputs computer drawing software respectively, and filling obtains each rgb value
The standard color block of corresponding color and color lump to be measured, and then titanium dioxide is evaluated according to the color distortion of color lump to be measured and standard color block
Titanium waits for that the color of test sample, the color distortion of color lump and standard color block to be measured are smaller, then it represents that titanium dioxide wait for the color of test sample with
The color distortion of titanium dioxide standard sample is smaller；The color distortion of color lump and standard color block to be measured is bigger, then it represents that titanium dioxide
Wait for that color and the color distortion of titanium dioxide standard sample of test sample are bigger.Method of the invention is by by L*a*b* systems as a result,
It is combined with RGB system, the color measurement value of titanium dioxide is converted to intuitive picture using computer, relative to comparison dioxy
Change X, Y, Z value of titanium sample, contrast standard color lump and the color of color lump to be measured are more intuitive efficient, and suitable for a large amount of different batches
The exchange of supplier, purchaser or technical staff are convenient in the intuitive comparison of secondary sample.
In addition, the method for evaluation titanium dioxide color according to the above embodiment of the present invention can also be with following additional
Technical characteristic：
In some embodiments of the invention, the L*a*b* aberration is calculated as HunterLab color difference meters.
In some embodiments of the invention, the titanium dioxide standard sample waits for test sample tristimulus values with the titanium dioxide
X, the difference of Y, Z are separately not more than 2, i.e. sample room △ X, △ Y, any one value of △ Z are no more than 2.
In some embodiments of the invention, step (4) carries out as follows：By the titanium dioxide standard sample
Rgb value inputs computer drawing software and carries out color filling, to obtain the standard color block, using the standard color block as the back of the body
Scenery, and the titanium dioxide is waited for that the rgb value of test sample is drawn as color filling and obtains the color lump to be measured.Pass through as a result,
Using standard color block as background colour, then color lump to be measured is drawn in reference colour background, can more it is intuitive efficiently differentiate it is to be measured
Whether color lump consistent with standard color block color, to differentiate titanium dioxide wait for test sample and titanium dioxide standard sample color whether one
It causes.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obviously, or practice through the invention is recognized.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination following accompanying drawings to embodiment
Obviously and it is readily appreciated that, wherein：
Fig. 1 is the schematic diagram of titanium dioxide color evaluation result in embodiment 1；
Fig. 2 is the schematic diagram of titanium dioxide color evaluation result in embodiment 2.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
In one aspect of the invention, the present invention proposes a kind of method of titanium dioxide color.Reality according to the present invention
Example is applied, this method includes：(1) it provides titanium dioxide standard sample and titanium dioxide waits for test sample；(2) L*a*b* colour difference meters are utilized to distinguish
Test obtains titanium dioxide standard sample and titanium dioxide waits for tristimulus values X, Y, Z of test sample；(3) respectively by titanium dioxide standard sample
Wait for that tristimulus values X, Y, Z of test sample are scaled rgb value with titanium dioxide；(4) titanium dioxide standard sample and titanium dioxide is to be measured
The rgb value of sample inputs computer drawing software and carries out color filling respectively, to obtain standard color block and color lump to be measured；(5) root
The color of test sample is waited for according to the color distortion of color lump to be measured and standard color block evaluation titanium dioxide.
According to an embodiment of the invention, the type of L*a*b* colour difference meters is not particularly restricted, and is based on as long as can test
The XYZ tristimulus values of 1976 L*a*b* of CIE (CIE LAB).In some embodiments of the invention, L*a*b* colour difference meters
HunterLab color difference meters may be used.
According to an embodiment of the invention, the titanium dioxide sample close for color, difference is smaller is directly seen by naked eyes
It examining sample powder and may result in the inconsistent of judgement, X, Y, Z value difference tested by L*a*b* colour difference meters are different also smaller,
It is not easy to compare, and X, Y, Z value are scaled rgb value by method using the present invention, and then by comparing the face corresponding to rgb value
Aberration it is different come judge different titanium dioxide samples color whether there is difference, to not only avoid carry sample trouble,
And it is not intuitive enough and cause directly to observe sample powder because people's naked eyes are different to compensate for direct contrast test data X, Y, Z value
The inconsistent problem of judging result.In some embodiments of the invention, titanium dioxide standard sample waits for test sample three with titanium dioxide
The difference of values X, Y, Z are separately not more than 2, i.e., titanium dioxide standard sample and titanium dioxide wait for the △ X of test sample, △ Y,
Any one value of △ Z is not more than 2, and method using the present invention evaluates the difference of △ X, △ Y, any one value of △ Z no more than 2
Titanium dioxide sample intuitively can efficiently evaluate the difference of color between titanium dioxide sample.
According to an embodiment of the invention, X, Y, Z value can be scaled RGB by method well known to those skilled in the art
Value.Specific example according to the present invention, the method that X, Y, Z value are scaled to rgb value can also be according to GB/T 20147-2006's
Method carries out mathematics inverse operation and is derived by.Specifically, GB/T 20147-2006 disclose the side for calculating X, Y, Z value by rgb value
Method, those skilled in the art can carry out mathematics inverse operation derivation according to this method, obtain X, Y, Z value being scaled rgb value
Method.
According to an embodiment of the invention, Adobe Photoshop may be used in above computer mapping software.
According to an embodiment of the invention, step (4) carries out as follows：Titanium dioxide standard sample rgb value is inputted
Computer drawing software carries out color filling, to obtain standard color block, using standard color block as background colour, and by titanium dioxide
It waits for that the rgb value of test sample is drawn as color filling and obtains color lump to be measured.As a result, by regarding standard color block as background colour, then
Color lump to be measured is drawn in reference colour background, can more it is intuitive efficiently differentiate color lump to be measured and standard color block color whether one
It causes, to differentiate that titanium dioxide waits for whether test sample is consistent with the color of titanium dioxide standard sample.According to an embodiment of the invention, when
Titanium dioxide is when test sample and titanium dioxide standard sample solid colour, then in the background colour that can not be obtained from titanium dioxide standard sample
See color lump to be measured；And titanium dioxide waits for that the color distortion of test sample and titanium dioxide standard sample is bigger, color lump to be measured is in reference colour
Highlighting in block background colour is more apparent.
The method of evaluation titanium dioxide color according to the ... of the embodiment of the present invention as a result, scores first with L*a*b* aberration
Titanium dioxide standard sample Ce Shi not obtained and wait for tristimulus values X, Y, Z of test sample, recycle formula that X, Y, Z value measured converts
For rgb value, by obtained titanium dioxide standard sample and wait for that test sample rgb value inputs computer drawing software respectively, filling obtains each
The standard color block of color corresponding to rgb value and color lump to be measured, and then evaluated according to the color distortion of color lump to be measured and standard color block
Titanium dioxide waits for that the color of test sample, the color distortion of color lump and standard color block to be measured are smaller, then it represents that titanium dioxide waits for test sample
Color and the color distortion of titanium dioxide standard sample are smaller；The color distortion of color lump and standard color block to be measured is bigger, then it represents that two
Titanium oxide waits for that the color of test sample and the color distortion of titanium dioxide standard sample are bigger.Method of the invention is by by L*a* as a result,
B* systems are combined with RGB system, the color measurement value of titanium dioxide are converted to intuitive picture using computer, relative to right
Than X, Y, Z value of titanium dioxide sample, contrast standard color lump and the color of color lump to be measured are more intuitive efficient, and suitable for a large amount of
The exchange of supplier, purchaser or technical staff are convenient in the intuitive comparison of different batches sample.
Below with reference to specific embodiment, present invention is described, it should be noted that these embodiments are only to describe
Property, without limiting the invention in any way.
Embodiment 1
Target titanium dioxide sample A, titanium dioxide sample B to be determined are provided and test out two using HunterLab color difference meters
Person's tristimulus values is as shown in table 1：
1 sample X, Y, Z value of table
By mathematical derivation, it is as shown in table 2 to be computed out the two rgb value：
2 sample rgb value of table
| Sample | R | G | B |
| A | 245 | 246 | 240 |
| B | 245 | 245 | 237 |
Background color lump is used as using pure white painting canvas (R=250, G=250, B=250) in computer drawing software,
It is filled respectively using the RGB numerical value of A, B as color on background color lump, gained color lump lie adjacent, such as Fig. 1 (picture is only for signal)
It is shown, the color distortion of energy intuitive judgment i.e. two samples of two kinds of color lumps.
Embodiment 2
Target titanium dioxide sample A is provided, the titanium dioxide sample to be determined 1,2,3,4,5 of different batches uses
It is as shown in table 3 that HunterLab color difference meters test out each sample tristimulus values：
3 sample X, Y, Z value of table
| Sample | X | Y | Z |
| A | 86.13 | 91.40 | 95.27 |
| 1 | 84.98 | 90.18 | 93.80 |
| 2 | 85.98 | 91.30 | 95.01 |
| 3 | 86.72 | 92.15 | 96.32 |
| 4 | 86.97 | 92.21 | 94.90 |
| 5 | 87.64 | 93.12 | 96.06 |
By mathematical derivation, it is as shown in table 4 to be computed out the two rgb value：
4 sample rgb value of table
| Sample | R | G | B |
| A | 245 | 246 | 240 |
| 1 | 243 | 244 | 238 |
| 2 | 245 | 246 | 239 |
| 3 | 245 | 247 | 241 |
| 4 | 247 | 247 | 239 |
| 5 | 247 | 248 | 240 |
Color filling is carried out as background color lump, in background colour using target sample rgb value in computer drawing software
Using the RGB numerical value of sample 1,2,3,4,5 to be determined as color, color lump is drawn in filling respectively on block, as shown in Fig. 2 (schematic diagram),
The difference of energy intuitive judgment color sample and background colour to be determined, and can intuitively reflect difference degree, to judge different batches
The color distortion of secondary titanium dioxide sample and standard items.
It should be noted that the pattern that each color lump and background colour are filled in Fig. 1 and Fig. 2 is only made to illustrate, in practical operation
Obtained color lump and background colour is pure color.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiments or example.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (4)
1. a kind of method of evaluation titanium dioxide color, which is characterized in that including：
(1) it provides titanium dioxide standard sample and titanium dioxide waits for test sample；
(2) it is tested respectively using L*a*b* colour difference meters and obtains the titanium dioxide standard sample and the titanium dioxide waits for the three of test sample
Values X, Y, Z；
(3) the titanium dioxide standard sample and the titanium dioxide are waited for that tristimulus values X, Y, Z of test sample are scaled RGB respectively
Value；
(4) the titanium dioxide standard sample and the titanium dioxide are waited for that the rgb value of test sample inputs computer drawing software respectively
Color filling is carried out, to obtain standard color block and color lump to be measured；
(5) color that the titanium dioxide waits for test sample is evaluated according to the color distortion of the color lump to be measured and the standard color block.
2. according to the method described in claim 1, it is characterized in that, the L*a*b* aberration is calculated as HunterLab color difference meters.
3. according to the method described in claim 1, it is characterized in that, the titanium dioxide standard sample and the titanium dioxide are to be measured
The difference of sample tristimulus values X, Y, Z are separately not more than 2.
4. according to the method described in claim 1, it is characterized in that, step (4) carries out as follows：
Titanium dioxide standard sample rgb value input computer drawing software is subjected to color filling, to obtain the standard
Color lump,
Using the standard color block as background colour, and the titanium dioxide is waited for that the rgb value of test sample is drawn as color filling
To the color lump to be measured.
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