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Natural mineral pigment color difference test method taking polydimethylsiloxane as substrate

A polydimethylsiloxane and natural mineral technology, applied in the field of pigments, can solve the problems of affecting the color performance of pigments, affecting color difference, and uneven dispersion of pigments, so as to improve detection accuracy, avoid detection errors, and achieve rapid efficiency. Effect

Active Publication Date: 2019-12-03
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Natural mineral pigments have weak adsorption properties and low color fastness, so glue alum water is needed to be firmly loaded on silk cloth or rock walls, and glue alum water and silk cloth or rock walls as carriers will greatly affect Pigment color performance
At the same time, the natural mineral pigment particles are large and uneven in particle size distribution, and their mass is much larger than that of organic pigment particles. It is also easy to cause uneven dispersion of pigments during coating.
Finally, the preparation of traditional pigment samples is largely affected by the craftsmen and utensils of the producers. If the drawing skills of the experimenters are not high, the quality of the finished samples will be uneven
These will greatly affect the determination of color difference

Method used

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  • Natural mineral pigment color difference test method taking polydimethylsiloxane as substrate
  • Natural mineral pigment color difference test method taking polydimethylsiloxane as substrate
  • Natural mineral pigment color difference test method taking polydimethylsiloxane as substrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1) To ensure that the mineral pigment is dry and free of impurities, use a mechanical pulverizer to crush large particles of lapis lazuli (natural mineral pigment) into powder, and the crushing time is 0.5min;

[0036] 2) using a standard vibrating sieve machine to process the lapis lazuli powder obtained in step 1) for 20 minutes, and using standard sieves with mesh numbers of 70 and 160 to screen out mineral pigment powders with a particle size of 100-200 nm;

[0037] 3) Evenly mix the polydimethylsiloxane main agent (agent A) with the polydimethylsiloxane curing agent (B agent), the mass ratio is B:A=1:19.5, the mixed solution of each test The dosage is 5.9g, and it is best to use a biological surface dish with a diameter of 6cm for the mixing vessel;

[0038] 4) Weigh 0.3 g of the lapis lazuli powder obtained in step 2) and put it into the polydimethylsiloxane mixture obtained in step 3) and mix and stir until the uneven color blocks in the mixture completely disapp...

Embodiment 2

[0044] 1) To ensure that the mineral pigment is dry and free of impurities, use a mechanical powder machine to crush large granules of turquoise (natural mineral pigment) into powder, and the crushing time is 1 minute;

[0045] 2) using a standard vibrating sieve machine to process the turquoise powder obtained in step 1) for 21 minutes, and using standard sieves with mesh numbers of 70 and 160 to screen out mineral pigment powders with a particle size of 100-200nm;

[0046] 3) Evenly mix the polydimethylsiloxane main agent (agent A) with the polydimethylsiloxane curing agent (B agent), the mass ratio is B:A=1:20.5, the mixed solution of each test The dosage is 6.1g, and it is best to use a biological surface dish with a diameter of 6cm for the mixing vessel;

[0047]4) Weigh 0.5 g of the turquoise powder obtained in step 2) into the polydimethylsiloxane mixture obtained in step 3) and mix and stir until the uneven color blocks in the mixture completely disappear;

[0048] 5)...

Embodiment 3

[0053] 1) To ensure that the mineral pigment is dry and free of impurities, use a mechanical powder machine to crush large particles of malachite (natural mineral pigment) into powder, and the crushing time is 0.7min;

[0054] 2) Process the malachite powder obtained in step 1) for 20.5 minutes using a standard vibrating sieve machine, and use standard sieves with mesh numbers of 70 and 160 to screen mineral pigment powders with a particle size of 100-200 nm;

[0055] 3) Evenly mix the polydimethylsiloxane main agent (agent A) with the polydimethylsiloxane curing agent (B agent), the mass ratio is B:A=1:20, the mixed solution of each test The dosage is 6g, and the mixing vessel is best to use a biological surface dish with a diameter of 6cm;

[0056] 4) Weigh 0.4 g of the malachite powder obtained in step 2) and put it into the polydimethylsiloxane mixture obtained in step 3) and mix and stir until the uneven color blocks in the mixture completely disappear;

[0057] 5) Use a...

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Abstract

The invention relates to the pigment field, and discloses a natural mineral pigment color difference test method taking polydimethylsiloxane as a substrate. The method comprises the following steps: 1) natural mineral pigment crushing; 2) pigment powder particle size screening; 3) preparation of polydimethylsiloxane; 4) mixing the pigment powders with the polydimethylsiloxane; 5) spin coating of the mixed solution; 6) vacuum polymerization of the polydimethylsiloxane; 7) standing and curing of the polydimethylsiloxane; and 8) color difference analysis. The natural mineral pigment color difference test method taking the polydimethylsiloxane as the substrate can be used for test of color difference of various natural mineral pigments, and has very important practical significance for study of the natural mineral pigments in China.

Description

technical field [0001] The invention relates to the field of pigments, in particular to a method for testing the color difference of natural mineral pigments based on polydimethylsiloxane. Background technique [0002] For pigments, color is its most important property. The performance of a pigment mainly depends on its color performance. In the field of color management, color difference testing is one of the most important performance tests for pigments. By performing a color difference test and detecting the values ​​of the pigment ΔL*, Δa*, Δb* and ΔE, the exact position of the color in the color space can be found, and the color performance of the pigment in practical applications can be known. [0003] Usually for color difference testing, it is necessary to use a spectrophotometer to detect pigment samples, and the pigments are generally loaded on a certain carrier, such as silk cloth, white paper, wood, slate or various printed matter. Synthetic pigments are genera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J3/46
CPCG01J3/46
Inventor 彭志勤刘珉琦王晓云何宇杰黄诗莹万军民
Owner ZHEJIANG SCI-TECH UNIV
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