CN106568767B - Quickly differentiate the method for true and false natural color cotton and its product - Google Patents
Quickly differentiate the method for true and false natural color cotton and its product Download PDFInfo
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Abstract
The invention discloses a kind of methods quickly differentiating true and false natural color cotton and its product to include the following steps using cotton or cotton products as product to be tested：1) treatment fluid, is prepared, the treatment fluid is by following weight content at being grouped as：Aromatic aldehyde 0%~5%, alcohol 1~90%, acid 0.5~50%, water surplus；2), product to be tested is put into treatment fluid and carries out immersion treatment in 0~95 DEG C；3), differentiate whether it belongs to natural color cotton according to the variation of product to be tested color after immersion treatment.True and false natural liquor storeroom and true and false nature forest resource can be differentiated simultaneously using method provided by the invention.
Description
Technical field
The present invention relates to the quick discriminating sides of true and false natural color cotton in natural color cotton production and its commodity circulation
Method.
Background technology
Natural color cotton is as a kind of " green " environment-protection fiber that need not be bleached, dye, by the favor of consumer, and
Preferable business development is obtained.China has become maximum natural color cotton plant development big country in the world, and it is total to account for the world
The 60% of yield, it is more than 30,000,000,000 yuan to produce total value per year.Environmentally protective is the significant characteristic of natural color cotton, and consumer is to pure day
The demand of right hygienic environment-protecting type textile has been greatly facilitated the development of natural color cotton piece market, but counterfeit and shoddy goods
It comes into being therewith.White cotton at the color close to natural color cotton, is pretended to be natural color cotton to sell on the market by criminal
It sells, leading to market, the good and bad jumbled together, and natural color cotton production, distributors' interests sustain a loss.
In order to safeguard that the interests of natural color cotton businessman and consumer, specification color cotton market promote color cotton industry
It develops in a healthy way, supervision, the certification in market are also essential.Accomplish this point, possesses a set of simple, reliable qualitative natural colorful
The method of cotton raw material and product is particularly important.But there are no a kind of reliable color cotton qualitative identification methods in commodity inspection.
Currently, the detection method reported is more, such as N element content measuring method (patent CN 200610118615.X), Flavone content
Method of testing (patent CN 201410263423.2), copper ammon solution processing+microscopic observation (patent CN
200710098853.3), ultraviolet-visible diffuse reflectance spectrum method (patent CN 201210539850.X), etc..These methods or
It is that detecting step is cumbersome, take time and effort or influence factor is numerous and accuracy rate is not high, or needs valuable scientific instrument,
Operability for commodity inspection is not strong.
Invention content
The technical problem to be solved in the present invention is to provide a kind of true and false natural liquor storeroom based on chemical colour reaction reaction and very
The identification method of false nature forest resource.
In order to solve the above technical problem, the present invention provides a kind of sides quickly differentiating true and false natural color cotton and its product
Method includes the following steps using cotton or cotton products as product to be tested：
1) treatment fluid (polynary treatment fluid), is prepared：
The treatment fluid is by following weight content at being grouped as：
2), product to be tested is put into treatment fluid and carries out immersion treatment in 0~95 DEG C (preferably 10 DEG C of room temperature~95 DEG C)；
3), differentiate whether it belongs to natural color cotton according to the variation of product to be tested color after immersion treatment.
The improvement of the method for quickly differentiating true and false natural color cotton and its product as the present invention：
The step 3) is：
Product to be tested after immersion treatment is directly carried out to the differentiation of color change；
Alternatively, the differentiation that color change will be carried out after product to be tested washing, drying after immersion treatment again.
The further improvements in methods for quickly differentiating true and false natural color cotton and its product as the present invention：
The aromatic aldehyde is vanillic aldehyde (No. CAS：121-33-5) and to di methyl amino cinnamaldehyde (No. CAS：6203-18-
5) at least one of (that is, the two selects one or both all to select)；
The alcohol is methanol, ethyl alcohol, propyl alcohol；
The acid is inorganic acid or organic acid.
The further improvements in methods for quickly differentiating true and false natural color cotton and its product as the present invention：
The inorganic acid is hydrochloric acid, sulfuric acid, phosphoric acid, nitric acid；The organic acid is formic acid, acetic acid.
The further improvements in methods for quickly differentiating true and false natural color cotton and its product as the present invention：
When product to be tested is brown cotton or brown cotton products：
The preferable content of aromatic aldehyde is 0.01%~5% in treatment fluid；
The immersion treatment of the step 2) be impregnate at least 1 minute (soaking time length is more preferable, it is general 2)；
The step 3) is：
The color of product to be tested is significantly deepened after immersion treatment, that is, be in celadon, blackish green, grey black, dark-grey brown these
When feature, judgement product to be tested is natural liquor storeroom or natural brown cotton products；
Conversely, after immersion treatment the color of product to be tested do not change, (slightly shoaling) or the color change of slightly fading different from
When features described above color, then it is judged to dyeing brown cotton or the brown cotton products of dyeing.
The further improvements in methods for quickly differentiating true and false natural color cotton and its product as the present invention：
When product to be tested is green cotton or green cotton products：
The immersion treatment of the step 2) is at least 1 second (soaking time length is more preferable, general 10 seconds)；
The step 3) is：
The color of product to be tested significantly changes after immersion treatment, that is, when in light brown, brown, these features of rufous, sentences
It is nature forest resource or natural green cotton products to determine product to be tested；
Conversely, after immersion treatment the color of product to be tested do not change, (slightly shoaling) or the color change of slightly fading different from
When features described above color, then it is judged to dyeing green cotton or the green cotton products of dyeing.
The present invention treatment fluid be the polybasic reagent treatment fluid containing aromatic aldehyde, alcohol, acid and water, solution be pistac or
It is colourless, and pH≤5.5.
The present invention processing step be：Select the container (test tube, beaker etc.) of a sizeable glass or porcelain；It will
Sample immerses in the container for filling polynary treatment fluid；Container is placed into a period of time at room temperature or under heating condition；Visually
Observe the variation of color sample.
In the present invention, cotton sample product are carried out with processing 5 minutes or so at room temperature, you can distinguish true and false natural color cotton.
In order to faster, more accurately complete discrimination process, suitably treatment fluid can be heated.It will the washing of treated sample, drying
It can more accurately distinguish between colors, be conducive to accurately differentiate true and false natural liquor storeroom.
The principle of the present invention is：According to the result of study of this laboratory for many years, natural liquor storeroom and nature forest resource
Pigment composition is polyphenol compound, has the basic chemical property of phenolic compound.Phenolic compound under certain condition may be used
Phenol formaldehyde condensation occurs with aldehydes to react, this is the theoretical foundation of the present invention.Under specific condition, polyphenol pigment in color cotton with
Aromatic aldehyde has the possibility that chemical reaction as shown in Figure 1 occurs, and the color development system of pigment molecular is made to change, and then significantly
Change the color of color cotton.And the color cotton palmed off is dyed with synthetic dyestuffs, synthetic dyestuffs do not have Polyphenols substantially
Molecular structure as compounds reacts due to color development because without phenol formaldehyde condensation similar therewith occurs.
Compared with prior art, the present invention has following technical advantage：
1, the present invention according to the principle that natural color cotton pigment chemical property, be put forward for the first time using phenol formaldehyde condensation react,
Detection sample is handled using aldehydes reagent, differentiates true and false natural liquor storeroom and true and false natural by the variation of color sample
Green cotton.This method is easy, quick, differentiates that brown cotton sample only needs 5 minutes, differentiates that green cotton sample only needs the several seconds；The party
Method is reliable, and accuracy rate is high.
2, the formula for the treatment of fluid (polynary treatment fluid) is simple, cost is extremely low；
3, processing step is succinct.
In conclusion the chemical property of natural liquor storeroom and green cotton pigment is the present invention relates to the use of, using a kind of polynary
Chemical reagent treatment fluid, handles fiber under certain conditions, makes the color of natural colorful cotton fibre that specific variation occur, from
And achieve the purpose that quickly to differentiate true and false natural colorful cotton fibre and its product.Method provided by the invention can be simultaneously to true and false day
Right brown cotton and true and false nature forest resource are differentiated.This method is easy to operate, rapid, and experimental result is intuitive and reliable, is well suited for
For in the commercial detection of natural color cotton and its product.
Description of the drawings
The specific implementation mode of the present invention is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is the phenolic aldehyde chemical reaction mechanism figure that the present invention is based on.
Fig. 2 is the picture of the embodiment of the present invention 1 true and false natural liquor storeroom, true and false nature forest resource before and after the processing.
Fig. 3 is the picture of true and false natural liquor storeroom after 2-1 of the embodiment of the present invention is handled, true and false nature forest resource.
Fig. 4 is the picture of true and false natural liquor storeroom after the embodiment of the present invention 3 is handled, true and false nature forest resource.
Fig. 5 is the picture of true and false natural liquor storeroom after 4-1 of the embodiment of the present invention is handled, true and false nature forest resource.
Specific implementation mode
With reference to specific embodiment, the present invention is described further, but protection scope of the present invention is not limited in
This.
Remarks explanation：True/false natural liquor storeroom, true/false natural green cotton fiber described in following case are from market
The representative kind of upper collection, according to the highest ultraviolet-visible diffuse reflectance spectrum method of accuracy generally acknowledged at present
Confirm its correctness.
Concentrated hydrochloric acid refers to the hydrochloric acid of mass fraction >=37%.
Embodiment 1,
(weight percent) prepares treatment fluid according to the following formulation：
Vanillic aldehyde：1.5%
Methanol：50%
Acetic acid：23.5%
Water：Surplus (is settled to 100%).
The pH of the treatment fluid is about 0.4.
4 parts of above-mentioned treatment fluids of 7mL are taken respectively to be placed in a test tube respectively；The true/false natural liquor storeroom of corresponding addition 0.1g,
True/false natural green cotton fiber makes fiber immerse in treatment fluid, test tube is placed 5min in 95 DEG C of water-baths.
True and false brown cotton sample before and after the processing is washed 2 times in 100ml water, 60 DEG C are dried 30 minutes, before observation processing
The variation of fiber color afterwards.The directly true and false nature forest resource sample of observation before and after the processing.Color contrast is as shown in Figure 2.
Treated, and natural liquor storeroom is in grey black；And it dyes brown cotton and only slightly shoals, that is, it is slight to fade, but still be similar to
Original brown.
Nature forest resource color after processing becomes light brown, and dyes green cotton color and be basically unchanged.
Therefore this method can effectively differentiate true and false natural liquor storeroom and true and false nature forest resource.
Embodiment 2-1,
(weight percent) prepares treatment fluid according to the following formulation：
To di methyl amino cinnamaldehyde：0.01%
Propyl alcohol：10%
Formic acid：4.09%
Water：Surplus (is settled to 100%).
The pH of the treatment fluid is about 1.53.
Take respectively 4 parts of above-mentioned treatment fluids of 7mL respectively merging one test tube in, the true and false natural liquor storerooms of corresponding additions 0.1g with
True and false natural green cotton fiber makes fiber immerse in treatment fluid, places 10min at room temperature.
True and false brown cotton sample before and after the processing is washed 2 times, the change of fiber color before and after the processing is observed in 60 DEG C of drying
Change.The directly true and false nature forest resource sample of observation before and after the processing.Color contrast is as shown in Figure 3.
Treated, and natural liquor storeroom is in celadon, and dyes brown cotton and only slightly shoal；Nature forest resource face after processing
Discoloration is at rufous, and it is slightly thin out to dye green cotton color.Therefore, this method can effectively differentiate true and false natural liquor storeroom and natural green
Color cotton.
Embodiment 2-2, cancel the use " to di methyl amino cinnamaldehyde " in embodiment 2-1, that is, its content is by 0.01%
Make 0% into；The corresponding content for adjusting water；Remaining is equal to embodiment 2-1.Only reflect to true and false natural green cotton fiber
Not.
Nature forest resource color after processing becomes light brown, and it is slightly thin out to dye green cotton color.Therefore, this method
It can effectively differentiate true and false nature forest resource；But visually the comparison strong degree of color is not so good as embodiment 2-1.
Embodiment 2-3, the time for placing the true and false natural green cotton fiber in embodiment 2-1 at room temperature are by 10min
Make into 10 seconds；Remaining is equal to embodiment 2-1.Only true and false natural green cotton fiber is differentiated.
Nature forest resource color after processing becomes light brown, and it is slightly thin out to dye green cotton color.Therefore, this method
It can effectively differentiate true and false nature forest resource；But visually the comparison strong degree of color is not so good as embodiment 2-1.
Embodiment 2-4, true and false brown cotton sample before and after the processing is cancelled and " is observed again after washing, drying fine before and after the processing
Tie up the variation of color ", that is, and directly observe the color of true and false natural liquor storeroom sample before and after the processing；Remaining is equal to reality
Apply a 2-1.Only true and false natural brown cotton fiber is differentiated.
Treated, and natural liquor storeroom is in celadon, and dyes brown cotton and only slightly shoal；Therefore, this method also can effectively differentiate
True and false natural liquor storeroom.
Embodiment 3,
(weight percent) prepares treatment fluid according to the following formulation：
Vanillic aldehyde：0.5%
Ethyl alcohol：70%
Concentrated hydrochloric acid：19.5%
Water：Surplus (is settled to 100%).
The pH of the treatment fluid is about 0.21.
Take respectively 4 parts of above-mentioned treatment fluids of 7mL respectively merging one test tube in, the true and false natural liquor storerooms of corresponding additions 0.1g with
True and false natural green cotton fiber makes fiber immerse in treatment fluid, test tube is placed on 2min in 50 DEG C of water-baths.
True and false brown cotton sample before and after the processing is washed 2 times, 60 DEG C dry 30 minutes, observe fiber color before and after the processing
Variation.The directly true and false nature forest resource sample of observation before and after the processing.Color contrast is as shown in Figure 4.
Treated, and natural liquor storeroom is in blackish green, and dyes brown cotton and only slightly shoal；Nature forest resource face after processing
Discoloration is at rufous, and it is slightly thin out to dye green cotton color.Therefore, this method can effectively differentiate true and false natural liquor storeroom and natural green
Color cotton.
Embodiment 4-1,
(weight percent) prepares treatment fluid according to the following formulation：
To di methyl amino cinnamaldehyde：3.5%
Propyl alcohol：85%
Phosphoric acid：0.7%
Water：Surplus (is settled to 100%).
The pH of the treatment fluid is about 4.02.
Take respectively 4 parts of above-mentioned treatment fluids of 7mL respectively merging one test tube in, the true and false natural liquor storerooms of corresponding additions 0.1g with
True and false natural green cotton fiber makes fiber immerse in treatment fluid, test tube is placed 5min at room temperature.
True and false brown cotton sample before and after the processing is washed 2 times, 60 DEG C dry 30 minutes, observe fiber color before and after the processing
Variation.The directly true and false nature forest resource sample of observation before and after the processing.Color is as shown in Figure 5.
Treated, and natural liquor storeroom is in grey black, and dyes brown cotton and only slightly shoal；Nature forest resource face after processing
Discoloration dyes that green cotton color is constant, and this method can effectively differentiate true and false natural liquor storeroom and nature forest resource at light brown.
Embodiment 4-2, by 3.5% into 5% will be made to the content of di methyl amino cinnamaldehyde in embodiment 4-1, accordingly changed
Become the content of water, remaining is equal to embodiment 4-1.
Treated, and natural liquor storeroom is in grey black, and dyes brown cotton and only slightly shoal；Nature forest resource face after processing
Discoloration dyes that green cotton color is constant, and this method can effectively differentiate true and false natural liquor storeroom and nature forest resource at light brown.
Comparative example 1-1, make the vanillic aldehyde in embodiment 1 into 10.0% by 1.5%, the corresponding content for changing water, remaining
It is equal to embodiment 1.
Acquired results are：The color of treated natural liquor storeroom slightly deepens, and the color for dyeing brown cotton is also brown, place
The brown cotton region of crude palm cotton and dyeing after reason is not it is obvious that differentiating that natural liquor storeroom and dyeing brown cotton are more difficult；Through place
The color of nature forest resource after reason slightly shoals, and it is constant to dye green cotton color, is carried out to true and false nature forest resource according to color change
It distinguishes, erroneous judgement possibility is higher.
Therefore the prescription for the treatment of liquid is for differentiating that true and false natural liquor storeroom and true and false nature forest resource, accuracy rate are relatively low.
Comparative example 1-2, make the vanillic aldehyde in embodiment 1 into 0% (that is, cancelling the use of vanillic aldehyde) by 1.5%, accordingly
Water make 26.5% by 25%, remaining is equal to embodiment 1.Only true/false natural liquor storeroom is detected.
Acquired results are：The color of treated natural liquor storeroom is constant, and the color for dyeing brown cotton slightly shoals, after processing
Crude palm cotton and the brown cotton region of dyeing be not it is obvious that cannot effectively differentiate natural liquor storeroom and dyeing brown cotton.
Therefore the prescription for the treatment of liquid is for differentiating that true and false natural liquor storeroom and true and false nature forest resource, accuracy rate are relatively low.
Comparative example 1-3, make the vanillic aldehyde in embodiment 1 into benzaldehyde, content is constant, remaining is equal to embodiment 1.
Acquired results are：The color of treated natural liquor storeroom is constant, and the color for dyeing brown cotton is also constant, therefore cannot
Effectively differentiate natural liquor storeroom and dyeing brown cotton；The slightly general brown of the color of nature forest resource after processing, dyes green cotton face
Color is constant, and color change distinguishes true and false nature forest resource according to this, and erroneous judgement possibility is higher.
Therefore the prescription for the treatment of liquid is for differentiating that true and false natural liquor storeroom and true and false nature forest resource, accuracy rate are relatively low.
Comparative example 1-4, make the vanillic aldehyde in embodiment 1 into anisaldehyde, content is constant, remaining is equal to embodiment 1.
Acquired results are：The color of treated natural liquor storeroom slightly shoals, and the color for dyeing brown cotton is basically unchanged, therefore
It cannot effectively differentiate natural liquor storeroom and dyeing brown cotton；The slightly general brown of the color of nature forest resource after processing, dyeing are green
Cotton color is constant, and color change distinguishes true and false nature forest resource according to this, and erroneous judgement possibility is higher.
Therefore the prescription for the treatment of liquid is for differentiating that true and false natural liquor storeroom and true and false nature forest resource, accuracy rate are relatively low.
Comparative example 1-5, the use for cancelling acetic acid in embodiment 1, the corresponding content for increasing water；Remaining is equal to embodiment 1.
The pH of the treatment fluid is about 6.8.
Acquired results are：The color of treated natural liquor storeroom is constant, and the color for dyeing brown cotton is also constant, therefore cannot
Effectively differentiate natural liquor storeroom and dyeing brown cotton；The color of nature forest resource after processing is constant, dyes green cotton color
It is constant, thus cannot true and false nature forest resource distinguished.
Therefore the prescription for the treatment of liquid cannot be used for effectively differentiating true and false natural liquor storeroom and true and false nature forest resource.
Comparative example 2-1, by 3.5% into 10% will be made to di methyl amino cinnamaldehyde in embodiment 4-1, accordingly changes water
Content, remaining is equal to embodiment 4-1.
Acquired results are：The color of treated natural liquor storeroom is deeper, and the color for dyeing brown cotton also deepens, and treated
Although crude palm cotton and the brown cotton of dyeing are had any different, but distinguish and be not so good as the with obvious effects of inventive formulation；After processing natural
The color of green cotton slightly shoals, and dyes green cotton color and also shoals, and color change distinguishes true and false nature forest resource according to this, accidentally
It is higher to sentence possibility.
Therefore the prescription for the treatment of liquid is for differentiating that true and false natural liquor storeroom and true and false nature forest resource, accuracy rate are relatively low.
Comparative example 2-2,0% will be made into (that is, cancelling to two by 3.5% to di methyl amino cinnamaldehyde in embodiment 4-1
The use of methylamino cinnamic acid), the corresponding content for changing water, remaining is equal to embodiment 4-1.
Acquired results are：The color of treated natural liquor storeroom slightly shoals, and the color for dyeing brown cotton also slightly shoals, and locates
The difference of the brown cotton of crude palm cotton and dyeing after reason is not it is obvious that therefore differentiating that natural liquor storeroom and dyeing brown cotton are relatively tired
It is difficult；The color of nature forest resource after processing slightly shoals, and dyes that green cotton color is constant, and color change is to true and false natural green according to this
Color cotton is distinguished that erroneous judgement possibility is higher.
Therefore the prescription for the treatment of liquid is for differentiating that true and false natural liquor storeroom and true and false nature forest resource, accuracy rate are relatively low.
Comparative example 2-3, in embodiment 4-1 into paradime thylaminobenzaldehyde, content will be made to di methyl amino cinnamaldehyde
Constant, remaining is equal to embodiment 4-1.
Acquired results are：The color of treated natural liquor storeroom is constant, and the color for dyeing brown cotton is also constant, Bu Nengyou
Effect differentiates natural liquor storeroom and dyeing brown cotton；The color of nature forest resource after processing slightly shoals, and dyes green cotton color not
Become, color change distinguishes true and false nature forest resource according to this, and erroneous judgement possibility is higher.
Therefore the prescription for the treatment of liquid is for differentiating that true and false natural liquor storeroom and true and false nature forest resource, accuracy rate are relatively low.
Comparative example 2-4, in embodiment 4-1 into Veratraldehyde will be made to di methyl amino cinnamaldehyde, contained
Measure constant, remaining is equal to embodiment 4-1.
Acquired results are：The color of treated natural liquor storeroom slightly deepens, and the color for dyeing brown cotton also slightly deepens, no
It can effectively differentiate natural liquor storeroom and dyeing brown cotton；The color of nature forest resource after processing slightly shoals, and dyes green cotton
Color also slightly shoals, and color change cannot distinguish according to this true and false nature forest resource.
Therefore the prescription for the treatment of liquid is for differentiating that true and false natural liquor storeroom and true and false nature forest resource, feasibility are relatively low.
Comparative example 2-5, the use for cancelling phosphoric acid in embodiment 4-1, the corresponding content for adjusting water；Remaining is equal to embodiment
4-1.The pH of the treatment fluid is about 6.2.
Acquired results are：The color of treated natural liquor storeroom is constant, and the color for dyeing brown cotton is also constant, Bu Nengyou
Effect differentiates natural liquor storeroom and dyeing brown cotton；The color of nature forest resource after processing is constant, dyes the color of green cotton
It is constant, true and false nature forest resource cannot be distinguished according to the color change of sample before and after the processing.
Therefore the prescription for the treatment of liquid does not have feasibility for differentiating true and false natural liquor storeroom and true and false nature forest resource.
Finally, it should also be noted that it is listed above be only the present invention several specific embodiments.Obviously, this hair
Bright to be not limited to above example, acceptable there are many deformations.Those skilled in the art can be from present disclosure
All deformations for directly exporting or associating, are considered as protection scope of the present invention.
Claims (6)
1. quickly differentiate the method for true and false natural color cotton and its product, it is characterized in that：Using cotton or cotton products as product to be tested, wrap
Include following steps：
1) treatment fluid, is prepared：
The treatment fluid is by following weight content at being grouped as：
2), product to be tested is put into treatment fluid and carries out immersion treatment in 0~95 DEG C；
3), differentiate whether it belongs to natural color cotton according to the variation of product to be tested color after immersion treatment.
2. the method according to claim 1 for quickly differentiating true and false natural color cotton and its product, it is characterized in that：
The step 3) is：
Product to be tested after immersion treatment is directly carried out to the differentiation of color change；
Alternatively, the differentiation that color change will be carried out after product to be tested washing, drying after immersion treatment again.
3. the method according to claim 1 or 2 for quickly differentiating true and false natural color cotton and its product, it is characterized in that：
The aromatic aldehyde is for vanillic aldehyde and at least one of di methyl amino cinnamaldehyde；
The alcohol is methanol, ethyl alcohol, propyl alcohol；
The acid is inorganic acid or organic acid.
4. the method according to claim 3 for quickly differentiating true and false natural color cotton and its product, it is characterized in that：
The inorganic acid is hydrochloric acid, sulfuric acid, phosphoric acid, nitric acid；The organic acid is formic acid, acetic acid.
5. the method according to claim 3 for quickly differentiating true and false natural color cotton and its product, it is characterized in that：
When product to be tested is brown cotton or brown cotton products：
The immersion treatment of the step 2) is to impregnate at least 1 minute；
The step 3) is：
The color of product to be tested is significantly deepened after immersion treatment, that is, is in celadon, blackish green, grey black, dark-grey brown these features
When color, judgement product to be tested is natural liquor storeroom or natural brown cotton products；
Conversely, when the color of product to be tested does not change after immersion treatment, slightly colour fading or color change are different from features described above color,
Then it is judged to dyeing brown cotton or the brown cotton products of dyeing.
6. the method according to claim 3 for quickly differentiating true and false natural color cotton and its product, it is characterized in that：
When product to be tested is green cotton or green cotton products：
The immersion treatment of the step 2) is at least 1 second；
The step 3) is：
The color of product to be tested significantly changes after immersion treatment, that is, when in light brown, brown, these features of rufous, judgement waits for
Survey product are nature forest resource or natural green cotton products；
Conversely, when the color of product to be tested does not change after immersion treatment, slightly colour fading or color change are different from features described above color,
Then it is judged to dyeing green cotton or the green cotton products of dyeing.
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| CN107271435B (en) * | 2017-05-31 | 2019-11-12 | 湖北省纤维检验局 | A kind of qualitative identification method of natural color cotton product |
| CN109813706A (en) * | 2019-02-19 | 2019-05-28 | 东莞浦利姆环保科技有限公司 | Cotton pads fades degree detecting liquid and detection method |
| CN111505004B (en) * | 2020-04-21 | 2021-04-06 | 东华大学 | Method for identifying natural colored cotton and dyed cotton |
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