CN103485212B - Utilize the method for pulling color agent pulling color - Google Patents
Utilize the method for pulling color agent pulling color Download PDFInfo
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- CN103485212B CN103485212B CN201310397536.7A CN201310397536A CN103485212B CN 103485212 B CN103485212 B CN 103485212B CN 201310397536 A CN201310397536 A CN 201310397536A CN 103485212 B CN103485212 B CN 103485212B
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Abstract
The present invention relates to fur manufacturing field, in particular to pulling color agent and preparation method thereof and utilize the method for this pulling color agent pulling color. Wherein, pulling color agent is made up of the first solution and second solution two parts; The first solution makes by the following method: sodium pyrosulfite is dissolved in water, then adds formic acid wherein, the pH value that makes solution is 2.7-2.9; The second solution makes by the following method: sodium borohydride is dissolved in sodium hydrate aqueous solution; Wherein, sodium hydrate aqueous solution is the solution that the water-soluble solution of every 100mL 38-42g NaOH obtains; And the weight ratio of sodium borohydride and NaOH is 3:9-11. Pulling color agent provided by the invention can not decomposed generation formaldehyde, thereby the threat to health and environment while having avoided pulling color.
Description
Technical field
The present invention relates to fur manufacturing field, in particular to pulling color agent and preparation side thereofMethod and utilize the method for this pulling color agent pulling color.
Background technology
One master operation in fur dyeing and finishing technology is pulling color. Pulling color is that the agent of employing pulling color willDye the process that the color on fur is removed or shoaled, its main purpose is: fur is producedSpecial color effect, or for follow-up again dye or change dye other colors.
In correlation technique, the main component of pulling color agent is sodium formaldehyde sulphoxylate. Its pulling colorPrinciple is: utilize the reproducibility of self that the azo bond of dyestuff on fur is destroyed, dyestuff is lostRemove coloring function, thereby realize pulling color object. Because sodium formaldehyde sulphoxylate is at 120 DEG CProduce toxic gas-formaldehyde lower can decomposition, and therefore, this pulling color agent can be to human body for pulling colorHealth or environment threaten.
Summary of the invention
The object of the present invention is to provide pulling color agent and preparation method thereof and utilize this pulling color agent to pull outThe method of look, to solve the above problems.
Pulling color agent is provided in an embodiment of the present invention, described pulling color agent by the first solution andSecond solution two parts composition;
Described the first solution makes by the following method: sodium pyrosulfite is dissolved in water,Add wherein formic acid, the pH value that makes solution is 2.7-2.9 again;
Described the second solution makes by the following method: sodium borohydride is dissolved in to NaOHIn the aqueous solution; Wherein, described sodium hydrate aqueous solution is the water-soluble solution of every 100mL 38-42gThe solution that NaOH obtains; And the weight ratio of described sodium borohydride and described NaOHFor 3:9-11.
The preparation method of above-mentioned pulling color agent is provided in an embodiment of the present invention, has comprised followingStep:
Described sodium pyrosulfite is dissolved in water, obtains described metabisulfite solution;
In described metabisulfite solution, add described formic acid, make the pH value of solution be2.7-2.9, obtain described the first solution;
Described sodium borohydride is dissolved in described sodium hydrate aqueous solution, obtains described secondSolution.
The method of utilizing above-mentioned pulling color agent pulling color is provided in an embodiment of the present invention, has comprisedThe following step:
Described the first solution is brushed on the fur for the treatment of pulling color;
Spray described the second solution to being brushed with on the described fur of described the first solution;
There is the described fur of described the second solution to carry out gas steaming processing to spraying.
The pulling color agent of the above embodiment of the present invention can not decomposed generation formaldehyde, thereby has avoided pulling outThreat to health and environment when look. Utilize the method for this pulling color agent pulling color to be: first willThe first solution is brushed on the fur for the treatment of pulling color; Spray to being brushed with on the fur of the first solution againTwo solution; Finally there is the fur of the second solution to carry out gas steaming processing to spraying. Wherein, firstSolution is matching while using, and the second solution can be preserved for a long time.
In addition the pulling color agent that, above-mentioned preparation method makes and utilize the side of this pulling color agent pulling colorMethod also can reach above-mentioned technique effect.
Detailed description of the invention
Below by specific embodiment, the present invention is described in further detail.
Embodiment mono-
This embodiment provides a kind of pulling color agent, and it is by the first solution and second solution two partsComposition;
The first solution makes by the following method: sodium pyrosulfite is dissolved in water, then toWherein add formic acid, the pH value that makes solution is 2.7-2.9;
The second solution makes by the following method: sodium borohydride is dissolved in to NaOH water-solubleIn liquid; Wherein, sodium hydrate aqueous solution is the water-soluble solution of every 100mL 38-42g NaOHThe solution obtaining; And the weight ratio of sodium borohydride and NaOH is 3:9-11.
Embodiment bis-
This embodiment provides another kind of pulling color agent, and it is by two of the first solution and the second solutionBe grouped into;
The first solution makes by the following method: sodium pyrosulfite is dissolved in water, then toWherein add formic acid, the pH value that makes solution is 2.8;
The second solution makes by the following method: sodium borohydride is dissolved in to NaOH water-solubleIn liquid; Wherein, sodium hydrate aqueous solution is that the water-soluble solution of every 100mL 40g NaOH obtainsSolution; And the weight ratio of sodium borohydride and NaOH is 3:10.
Embodiment tri-
This embodiment provides another kind of pulling color agent, and it is by two of the first solution and the second solutionBe grouped into;
The first solution makes by the following method: sodium pyrosulfite is dissolved in water, then toWherein add formic acid, the pH value that makes solution is 2.7;
The second solution makes by the following method: sodium borohydride is dissolved in to NaOH water-solubleIn liquid; Wherein, sodium hydrate aqueous solution is that the water-soluble solution of every 100mL 38g NaOH obtainsSolution; And the weight ratio of sodium borohydride and NaOH is 3:9.
Embodiment tetra-
This embodiment provides another kind of pulling color agent, and it is by two of the first solution and the second solutionBe grouped into;
The first solution makes by the following method: sodium pyrosulfite is dissolved in water, then toWherein add formic acid, the pH value that makes solution is 2.9;
The second solution makes by the following method: sodium borohydride is dissolved in to NaOH water-solubleIn liquid; Wherein, sodium hydrate aqueous solution is that the water-soluble solution of every 100mL 42g NaOH obtainsSolution; And the weight ratio of sodium borohydride and NaOH is 3:11.
The pulling color agent that above-mentioned four embodiment provide can not decomposed generation formaldehyde, thereby has avoidedThreat to health and environment when pulling color. Utilize the method for this pulling color agent pulling color to be: firstThe first solution is brushed on the fur for the treatment of pulling color; Spray to being brushed with on the fur of the first solution againThe second solution; Finally there is the fur of the second solution to carry out gas steaming processing to spraying. Wherein,One solution is matching while using, and the second solution can be preserved for a long time.
The pulling color principle of above-mentioned pulling color agent is as follows:
First the first solution produces following chemical reaction:
3Na2S2O5+2H2O+HCOOH→5NaHSO3+NaCOOH+SO2。
When the first solution and the second solution, meeting after fur surface comes in contact is anti-below occurringShould:
NaBH4+4NaHSO3→4NaHSO2+B(OH)3+NaOH。
The NaHSO finally generating2Having very strong reproducibility, is the main component of pulling color,Azo bond in dyestuff on fur can be destroyed, make dyestuff lose coloring function, reach and pull outThe object of look.
In addition, in pulling color process, the ratio of the first solution and the second solution and above twoThe concentration of kind of solution can regulate according to actual needs, for example pulling color journey as requestedDegree etc.
In pulling color agent mentioned above, can also add auxiliary agent, to strengthen the performance of pulling color agent.Be specially:
When for example, adding formic acid while, making the first solution, also add with lower a kind of orMultiple: arabo-ascorbic acid, gluconic acid sodium salt, ascorbic acid. Because these materials all haveStronger reproducibility, therefore adds above reducing substances can increase the antioxygen of the first solutionVoltinism, ensures that the first solution can not lose efficacy at short notice, while extending the onset of the first solutionBetween.
When for example, adding formic acid while, making the first solution, also add with lower a kind of orMultiple: titanium dioxide, fluorescent whitening agent. These two materials are brightening agent, therefore add aboveMaterial can make the hair brilliant white more after pulling color, meets user and remove the demand of color.
When for example, adding formic acid while, making the first solution, also add anthraquinone. Anthraquinone hasCatalysis, therefore, add this material can make pulling color reaction sooner, more abundant.
When for example, adding formic acid while, making the first solution, also add with lower a kind of orMultiple: ethylene glycol, polyethylene glycol, AEO (JFC). These material toolsThere are wetting and osmotic effect, therefore add above material to be conducive to pulling color agent infiltration and level dyeing,Make pulling color even, effect is better.
Embodiment five
This embodiment provides the preparation method of above-mentioned pulling color agent, comprises the following steps:
Step 101: sodium pyrosulfite is dissolved in water, obtains metabisulfite solution;
Step 102: add formic acid in metabisulfite solution, make the pH value of solution be2.7-2.9, obtains the first solution;
Step 103: sodium borohydride is dissolved in sodium hydrate aqueous solution, obtains second moltenLiquid.
Adopt the pulling color agent prepared of said method to there is the technology identical with pulling color agent aboveEffect.
Embodiment six
This embodiment provides the method for utilizing pulling color agent pulling color mentioned above, comprises followingStep:
Step 201: the first solution is brushed on the fur for the treatment of pulling color;
Step 202: spray the second solution to being brushed with on the fur of the first solution;
Step 203: have the fur of the second solution to carry out gas steaming processing to spraying.
Gas in above-mentioned steps 203 steams and refers to gas steaming process used in traditional pulling color technique.
The pulling color principle phase of the pulling color principle of above method and the pulling color agent of embodiment mono-to fourWith.
In addition, the method for above-mentioned pulling color can also further be improved, to reach more usefulEffect, for example:
Preferably, the method that gas steams is: in the steam of 85-90 DEG C, steam 5-10min. AdoptThis condition can make pulling color better effects if, makes pulling color speed faster.
Preferably, the first solution brushed after the step on the fur for the treatment of pulling color and sprayed theAlso comprise before two solution: by the second solution dilution to be sprayed, make sodium borohydride whereinConcentration is 40g/L or 50g/L or 80g/L or 100g/L. Be above-mentioned by the second solution dilutionConcentration, can reduce the injury of pulling color agent to fur, avoids hair to come off or the problem such as skin breakage.
In addition, pulling color agent above can be used for the various furs that are colored. Equally, aboveThe pulling color method providing is also applicable to the various furs that are colored, for example sheepskin, ox-hide, rabbitSkin, raw fox skin, recoon dog skin, recoon dog hair etc.
In order to illustrate further performance of the present invention, below also provide concrete test example.
Hereinafter, the percentage concentration of the second solution all refers to the contained hydroboration of every 100mL solution(unit is g) to the quality of sodium, and for example the second solution of 4% refers to that sodium borohydride concentration isThe solution of 40g/L.
Preparation and the use of test example 1 pulling color agent
(1) at room temperature produce the first solution, 125g sodium pyrosulfite is dissolved into 500mLWater in, stir to clarify with glass bar, solution is clear yellow solution, pH valueBe 4.6. 85% formic acid solution that adds wherein again 30mL, is stirred to solution clear,Surveying its pH value is 2.8, and this is the first solution.
(2) under room temperature, produce the second solution, by 40g dissolution of sodium hydroxide to containing 100mLIn the beaker of water, magnetic agitation is uniformly dissolved it, is warming up to 80 DEG C, treats solution in beakerClarification, adds 12gNaBH4, stir half an hour, obtain the second solution.
(3) the first solution is brushed to white rabbit surface on the grass having dyed with brush, use glass barHair is pressed suitable, the second solution dilution is become 4% solution be put in watering can, utilize the watering can willThe second solution of dilution is sprayed onto fur surface uniformly, and then take and in steam chest, carry out gas steaming,The temperature of steam chest is 90 DEG C, and gas steams 5 to 10 minutes, obtains well grass of dawn effectUpper white rabbit.
Preparation and the use of test example 2 pulling color agent
(1) at room temperature produce the first solution, 125g sodium pyrosulfite is dissolved into 500mLWater in, stir to clarify with glass bar, solution is clear yellow solution. Again to85% formic acid solution that wherein adds 30mL, is stirred to solution clear, and this is firstSolution.
(2) the first solution is brushed to white rabbit surface on the grass having dyed with brush, use glass barHair is pressed suitable, the second solution dilution is become 5% solution be put in watering can, utilize the watering can willThe second solution of dilution is sprayed onto fur surface uniformly, and then take and in steam chest, carry out gas steaming,The temperature of steam chest is 90 DEG C, and gas steams 5 to 10 minutes, obtains well grass of dawn effectUpper white rabbit.
Preparation and the use of test example 3 pulling color agent
(1) at room temperature produce the first solution, 125g sodium pyrosulfite is dissolved into 500mLWater in, stir to clarify with glass bar, solution is clear yellow solution. Again to85% formic acid solution that wherein adds 30mL, is stirred to solution clear, and this is firstSolution.
(2) the first solution is brushed to white rabbit surface on the grass having dyed with brush, use glass barHair is pressed suitable, the second solution dilution is become 8% solution be put in watering can, utilize the watering can willThe second solution of dilution is sprayed onto fur surface uniformly, and then take and in steam chest, carry out gas steaming,The temperature of steam chest is 90 DEG C, and gas steams 5 to 10 minutes, obtains well grass of dawn effectUpper white rabbit.
Preparation and the use of test example 4 pulling color agent
(1) at room temperature produce the first solution, 125g sodium pyrosulfite is dissolved into 500mLWater in, stir to clarify with glass bar, solution is clear yellow solution. Again to85% formic acid solution that wherein adds 30mL, is stirred to solution clear, and this is firstSolution.
(2) the first solution is brushed to white rabbit surface on the grass having dyed with brush, use glass barHair is pressed suitable, the second solution dilution is become 10% solution be put in watering can, utilize the watering can willThe second solution of dilution is sprayed onto fur surface uniformly, and then take and in steam chest, carry out gas steaming,The temperature of steam chest is 90 DEG C, and gas steams 5 to 10 minutes, obtains well grass of dawn effectUpper white rabbit.
Above the thinner ratio of the second solution all refers to " mass concentration and the dilution of solution after dilutionThe ratio of the mass concentration of front solution ".
In addition, the observation by above-mentioned test example 1-4 is found: along with the second solution concentrationIncrease, dawn effect can significantly increase, but in the time of the second solution concentration arrival 10%Wait hair is produced to injury, hair is easily brokenly easily come off. Therefore, in actual use, preferably makeWith the second solution of 10% following concentration, wherein, more preferably, second of use 4%Solution, safer.
Preparation and the use of test example 5 pulling color agent
(1) at room temperature produce the first solution, 125g sodium pyrosulfite is dissolved into 500mLWater in, stir to clarify with glass bar, solution is clear yellow solution. Again to85% formic acid solution that wherein adds 30mL, is stirred to solution clear, more molten to thisIn liquid, add 0.5g arabo-ascorbic acid, stir to clarify transparently, obtain the first solution.
(2) the first solution is brushed to white rabbit surface on the grass having dyed with brush, use glass barHair is pressed suitable, the second solution dilution is become 4% solution be put in watering can, utilize the watering can willThe second solution of dilution is sprayed onto fur surface uniformly, and then take and in steam chest, carry out gas steaming,The temperature of steam chest is 90 DEG C, and gas steams 5 to 10 minutes, obtains well grass of dawn effectUpper white rabbit.
Preparation and the use of test example 6 pulling color agent
(1) at room temperature produce the first solution, 125g sodium pyrosulfite is dissolved into 500mLWater in, stir to clarify with glass bar, solution is clear yellow solution. Again to85% formic acid solution that wherein adds 30mL, is stirred to solution clear, more molten to thisIn liquid, add 0.5g gluconic acid sodium salt, stir to clarify transparently, obtain the first solution.
(2) the first solution is brushed to white rabbit surface on the grass having dyed with brush, use glass barHair is pressed suitable, the second solution dilution is become 4% solution be put in watering can, utilize the watering can willThe second solution of dilution is sprayed onto fur surface uniformly, and then take and in steam chest, carry out gas steaming,The temperature of steam chest is 90 DEG C, and gas steams 5 to 10 minutes, obtains well grass of dawn effectUpper white rabbit.
Preparation and the use of test example 7 pulling color agent
(1) at room temperature produce the first solution, 125g sodium pyrosulfite is dissolved into 500mLWater in, stir to clarify with glass bar, solution is clear yellow solution. Again to85% formic acid solution that wherein adds 30mL, is stirred to solution clear, then to solutionIn add 0.5g ascorbic acid, stir to clarify transparently, obtain the first solution.
(2) the first solution is brushed to white rabbit surface on the grass having dyed with brush, use glass barHair is pressed suitable, the second solution dilution is become 4% solution be put in watering can, utilize the watering can willThe second solution of dilution is sprayed onto fur surface uniformly, and then take and in steam chest, carry out gas steaming,The temperature of steam chest is 90 DEG C, and gas steams 5 to 10 minutes, obtains well grass of dawn effectUpper white rabbit.
Preparation and the use of test example 8 pulling color agent
(1) at room temperature produce the first solution, 125g sodium pyrosulfite is dissolved into 500mLWater in, stir to clarify with glass bar, solution is clear yellow solution. Again to85% formic acid solution that wherein adds 30mL, is stirred to solution clear, more molten to thisIn liquid, add 0.5g titanium dioxide, stir to clarify transparently, obtain the first solution.
(2) the first solution is brushed to white rabbit surface on the grass having dyed with brush, use glass barHair is pressed suitable, the second solution dilution is become 4% solution be put in watering can, utilize the watering can willThe second solution of dilution is sprayed onto fur surface uniformly, and then take and in steam chest, carry out gas steaming,The temperature of steam chest is 90 DEG C, and gas steams 5 to 10 minutes, obtains well grass of dawn effectUpper white rabbit.
Preparation and the use of test example 9 pulling color agent
(1) at room temperature produce the first solution, 125g sodium pyrosulfite is dissolved into 500mLWater in, stir to clarify with glass bar, solution is clear yellow solution. Again to85% formic acid solution that wherein adds 30mL, is stirred to solution clear, more molten to thisIn liquid, add 0.5g double styrene class brightening agent (F17), stir to clarify transparently, obtain firstSolution.
(2) the first solution is brushed to white rabbit surface on the grass having dyed with brush, use glass barHair is pressed suitable, the second solution dilution is become 4% solution be put in watering can, utilize the watering can willThe second solution of dilution is sprayed onto fur surface uniformly, and then take and in steam chest, carry out gas steaming,The temperature of steam chest is 90 DEG C, and gas steams 5 to 10 minutes, obtains well grass of dawn effectUpper white rabbit.
Preparation and the use of test example 10 pulling color agent
(1) at room temperature produce the first solution, 125g sodium pyrosulfite is dissolved into 500mLWater in, stir to clarify with glass bar, solution is clear yellow solution. Again to85% formic acid solution that wherein adds 30mL, is stirred to solution clear, more molten to thisIn liquid, add 0.5g Coumarins brightening agent (F198), stir to clarify transparently, obtain firstSolution.
(2) the first solution is brushed to white rabbit surface on the grass having dyed with brush, use glass barHair is pressed suitable, the second solution dilution is become 4% solution be put in watering can, utilize the watering can willThe second solution of dilution is sprayed onto fur surface uniformly, and then take and in steam chest, carry out gas steaming,The temperature of steam chest is 90 DEG C, and gas steams 5 to 10 minutes, obtains well grass of dawn effectUpper white rabbit.
Preparation and the use of test example 11 pulling color agent
(1) at room temperature produce the first solution, 125g sodium pyrosulfite is dissolved into 500mLWater in, stir to clarify with glass bar, solution is clear yellow solution. Again to85% formic acid solution that wherein adds 30mL, is stirred to solution clear, more molten to thisIn liquid, add 0.2g anthraquinone, stir, obtain the first solution.
(2) the first solution is brushed to white rabbit surface on the grass having dyed with brush, use glass barHair is pressed suitable, the second solution dilution is become 4% solution be put in watering can, utilize the watering can willThe second solution of dilution is sprayed onto fur surface uniformly, and then take and in steam chest, carry out gas steaming,The temperature of steam chest is 90 DEG C, and gas steams 5 to 10 minutes, obtains well grass of dawn effectUpper white rabbit.
Preparation and the use of test example 12 pulling color agent
(1) at room temperature produce the first solution, 125g sodium pyrosulfite is dissolved into 500mLWater in, stir to clarify with glass bar, solution is clear yellow solution. Again to85% formic acid solution that wherein adds 30mL, is stirred to solution clear, more molten to thisIn liquid, add 5mL ethylene glycol, stir to clarify transparently, obtain the first solution.
(2) the first solution is brushed to white rabbit surface on the grass having dyed with brush, use glass barHair is pressed suitable, the second solution dilution is become 4% solution be put in watering can, utilize the watering can willThe second solution of dilution is sprayed onto fur surface uniformly, and then take and in steam chest, carry out gas steaming,The temperature of steam chest is 90 DEG C, and gas steams 5 to 10 minutes, obtains well grass of dawn effectUpper white rabbit.
Preparation and the use of test example 13 pulling color agent
(1) at room temperature produce the first solution, 125g sodium pyrosulfite is dissolved into 500mLWater in, stir to clarify with glass bar, solution is clear yellow solution. Again to85% formic acid solution that wherein adds 30mL, is stirred to solution clear, more molten to thisIn liquid, add 5mL polyethylene glycol, stir to clarify transparently, obtain the first solution.
(2) the first solution is brushed to white rabbit surface on the grass having dyed with brush, use glass barHair is pressed suitable, the second solution dilution is become 4% solution be put in watering can, utilize the watering can willThe second solution of dilution is sprayed onto fur surface uniformly, and then take and in steam chest, carry out gas steaming,The temperature of steam chest is 90 DEG C, and gas steams 5 to 10 minutes, obtains well grass of dawn effectUpper white rabbit.
Preparation and the use of test example 14 pulling color agent
(1) at room temperature produce the first solution, 125g sodium pyrosulfite is dissolved into 500mLWater in, stir to clarify with glass bar, solution is clear yellow solution. Again to85% formic acid solution that wherein adds 30mL, is stirred to solution clear, more molten to thisIn liquid, add the JFC of 2.5mL10%, stir to clarify transparently, obtain the first solution.
(2) the first solution is brushed to white rabbit surface on the grass having dyed with brush, use glass barHair is pressed suitable, the second solution dilution is become 4% solution be put in watering can, utilize the watering can willThe second solution of dilution is sprayed onto fur surface uniformly, and then take and in steam chest, carry out gas steaming,The temperature of steam chest is 90 DEG C, and gas steams 5 to 10 minutes, obtains well grass of dawn effectUpper white rabbit.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention,For a person skilled in the art, the present invention can have various modifications and variations. AllWithin the spirit and principles in the present invention, any amendment of doing, be equal to replacement, improvement etc.,Within all should being included in protection scope of the present invention.
Claims (2)
1. the method for utilizing pulling color agent pulling color, is characterized in that, comprises the following steps:
Described pulling color agent is made up of the first solution and second solution two parts;
Described the first solution makes by the following method: by molten 125g sodium pyrosulfiteSolution, in water, then adds formic acid and 0.2g anthraquinone wherein, makes the pH value of solution be2.7-2.9; And there is following chemical reaction in described the first solution:3Na2S2O5+2H2O+HCOOH→5NaHSO3+NaCOOH+SO2；
Described the second solution makes by the following method: 12g sodium borohydride is dissolved inIn sodium hydrate aqueous solution; Wherein, described sodium hydrate aqueous solution is every 100mLThe solution that water-soluble solution 40g NaOH obtains;
Be 40g/L by described the second solution dilution to the concentration of sodium borohydride;
Described the first solution is brushed on the fur for the treatment of pulling color;
On the fur of described the first solution, spray second molten after described dilution to being brushed withLiquid;
The fur that sprinkling is had to the second solution after described dilution is at the steam of 85-90 DEG CMiddle steaming 5-10min, wherein, the second solution after described the first solution and described dilutionReaction below occurring after fur Surface Contact:
NaBH4+4NaHSO3→4NaHSO2+B(OH)3+NaOH；
And NaHSO2It is the main component of pulling color.
2. the method for utilizing pulling color agent pulling color according to claim 1, is characterized in that,Described fur is with lower one:
Sheepskin, rabbit, raw fox skin, recoon dog skin.
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| CN104531911B (en) * | 2014-11-25 | 2016-09-28 | 浙江中辉皮草有限公司 | A kind of process of silver-blue fox fur imitated gold island Vulpes fur |
| CN105133398B (en) * | 2015-08-27 | 2017-06-09 | 中国轻工业武汉设计工程有限责任公司 | A kind of two layers of ox-hide simplified change colour technique |
| CN111088712B (en) * | 2019-11-19 | 2022-06-10 | 五邑大学 | Preparation method and application of efficient decoloring, flocculating, reducing and cleaning auxiliary |
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