CN108221119B

CN108221119B - Method for manufacturing alum-free mulberry silk for painting and calligraphy

Info

Publication number: CN108221119B
Application number: CN201711437749.2A
Authority: CN
Inventors: 许鼎龙; 蒋小贞; 李建华; 余志伟
Original assignee: Hangzhou Wensli Silk Culture Co ltd
Current assignee: Hangzhou Wensli Silk Culture Co ltd
Priority date: 2017-12-26
Filing date: 2017-12-26
Publication date: 2021-02-26
Anticipated expiration: 2037-12-26
Also published as: CN108221119A

Abstract

The invention relates to the silk textile field, in particular to a manufacturing process method of a real-silk non-alum ecological silk for silk painting and calligraphy; the method comprises the following steps: adopting white steam filature warp direction reeling above 5A grade, warping, and synchronously weaving on a machine with weft direction to obtain white blank silk; boiling the woven white blank spun silk by using a beam dyeing machine, then passing through a padder, and rolling and forming after passing through a heat setting machine; compared with the conventional process, the process design is special-the silk soaking process and the silk doubling process are omitted. The method aims to avoid waxing and white oil series of auxiliaries in the silk soaking process so as to avoid the complicated and complicated processes of removing wax and white oil and the like in the subsequent finishing, the properties of the finished silk paper product can be influenced if the auxiliaries such as the wax and the white oil are not removed completely, and the manufacturing process is completely environment-friendly if the silk soaking is removed.

Description

Method for manufacturing alum-free mulberry silk for painting and calligraphy

Technical Field

The invention relates to the field of silk weaving and after finishing, in particular to a method for manufacturing alum-free mulberry silk ecological silk for painting and calligraphy.

Background

Since Song China, silk for painting and calligraphy is used for preventing feathering, before the silk is used, alum is coated on the silk, namely a mixture of bone glue and alum in a proportion, the alum has the function of preventing feathering, the glue has the function of fixing the alum so that the alum does not fall off and the silk has paper texture, the product is called alum silk, although the feathering problem is solved due to the function of the alum, the alum is easy to oxidize when painting and calligraphy works are exposed in the air for a long time, the works are yellow and finally fade, the alum silk works are yellow within a few years generally, the storage time is not more than one hundred years at most, the alum is blurred as the time span is longer, and the alum silk can only be used as a painting and calligraphy material due to the function of water collection. With the continuous development of digital technology in recent times, works of famous painters in past generations are continuously copied in a high-definition mode and are widely applied to teaching, museum exhibition, collection and soft decoration of folk enthusiasts, in order to solve the problems of ink bleeding and difficult storage, one to two layers of rice paper (called gunn silk) are often compounded (mounted) on silk (semi-refined silk without being coated with alum), and in addition, some technical improvements are made on a digital machine, printed high-imitation works basically meet the collection requirements, but the work and the time are wasted in early treatment (mounting of rice paper), defective products are easy to appear, and the high-imitation works are sometimes unreliated.

In 2008, the silk weaving skill was selected in the national non-material cultural heritage list, however, the above mentioned shortcomings of silk for painting and calligraphy are still a long regret of silk producing enterprises, and it is known in exchange that: for many years, the problems that silk can be used for drawing strokes (alum silk is similar to mature rice) and can be used for drawing sketches (raw silk is similar to raw rice) and preserving aging are solved, and many methods are thought but no fundamental breakthrough is made. Therefore, the technological method of the invention is developed to solve the problems of difficulty and difficulty which cannot be solved by many generations of silk people for a long time, and breaks through the bottleneck in the technology, thereby making the best use of the materials and popularizing the materials. The method has the advantages that the functions of the base material for the painting and calligraphy are perfected, the advantages of the base material are kept, the method keeps pace with the era on the basis of inheritance, the modern requirements are met, the bright pearl of the silk weaving technology of the ecological silk for the painting and calligraphy is more bright after breakthrough, innovation and transformation, the ancient and profound effects are continuously exerted, and breakthrough, innovation and leap effects are realized.

In order to carry forward splendid culture of China and innovate the process, achieve the purposes of reserving and continuing the essence of non-ancient incence fire and realizing the vision of creative and bright connotation, complete the research and development work of laboratories from 2016 to 3 to 6 months, complete the test process of samples from 7 to 2017 months, and repeatedly debug and optimize the process, determine the optimized use of equipment and the optimization of process flow and parameters, the product belongs to the range of spun silk, and is characterized in that the product is not different from either spun alum or gunn silk, but also different from common spun silk sold in the market, thereby avoiding the defects of various products and solving the bottleneck problem of the variety.

More than 90 percent of the silk used for calligraphy and painting is produced in Shuanglin of Huzhou in the world, about twenty million meters exists, wherein the silk used for calligraphy and painting accounts for only (10-15)% of the total amount of the silk used for calligraphy and painting, namely about 200-300 million meters, the yield value is about one thousand to five million yuan, a small amount of silk base materials used for calligraphy and painting are produced around the Shuanglin and in Shaoxing areas in China, and other raw materials are rarely used, so that the Shuanglin of Huzhou only can represent the level of the silk used for calligraphy and painting in China at present, and the great status of the field is kept with basically stable yield and sale every year. The production of the double-forest silk is about dozens of workshops, the production means is relatively backward, some of the double-forest silk also use the traditional process and means, the weaving is performed by an old shuttle-thread loom, the alumen coating uses simple appliances, the post-treatment is multi-purpose manual, the productivity is relatively backward, and the defects are specifically shown on the product as follows: 1) the warp and weft density of the fabric can not meet the requirement, the gaps are large, ink is easy to leak when the produced spun silk painting and calligraphy are carried out, and the color of the dried painting is light; 2) even if the density problem is solved by filling gaps after the alum is coated (alum silk), the ink (color) is not easy to permeate, the picture is dried for a long time, and the painting is not easy to write (no dry-stroke effect) because the painting is technically finished by adopting the industrial painting, but the painting cannot be done; 3) the spun silk is soft and has no paper texture, ink is not completely remained, a writer needs to slowly write, and the pen needs to be added at the position of the writer from time to time, so that the quality of the painting and calligraphy is influenced. For the silk we have developed, the industry evaluates: the product breaks through the problem which is not solved for a long time in a short time, has higher grade than the product, and is the top in silk.

The existing silk manufacturing process is complex and tedious, and particularly relates to the field of weaving silk for silk painting and calligraphy, a silk soaking process (softening sericin and removing part of sericin, playing a role in lubricating the warp direction and softening the weft direction) is always arranged before a silk winding link before weaving in the existing process, waxing and other surfactants (influencing the quality performance of the painting and calligraphy creation process) are required in the process, refining processes such as paraffin removal and the like are inevitably carried out in the subsequent finishing process, the process is tedious, and the performance quality of silk finished products is influenced by the fact that paraffin and other surfactants are removed to the greatest extent.

Disclosure of Invention

Aiming at solving the problems that the prior silk cloth-real silk cloth for painting and calligraphy is a complicated manufacturing process, and the silk cloth finished product has the problems of ink blurring, burr and the like, so that the requirements of the painting process are difficult to meet; the invention provides a method for manufacturing alum-free mulberry silk ecological silk for painting and calligraphy, which comprises the following steps: adopting white steam filature warp-wise reeling above 5A grade, warping, and synchronously weaving on a machine with weft to obtain green spun silk;

and (3) after-finishing the woven green spun silk 1 by adopting steam, then passing through a padder, passing through a heat setting machine, and rolling and forming after coming out.

And (3) finishing the green spun silk rolled silk 2 by adopting a pressing method of a drum-type pressing machine, and rolling and forming after the green spun silk is taken out.

Preferably, the white steam filature in the manufacturing process method of the alum-free mulberry silk ecological silk for painting and calligraphy is preferably 6A grade, monofilament 1/20/22D, monofilament 1/17/19D or monofilament 1/27/29D.

Preferably, the warping process in the manufacturing process method of the alum-free mulberry silk ecological silk for painting and calligraphy is single-yarn double-drawing.

Preferably, the weft weaving former process in the manufacturing process method of the alum-free mulberry silk ecological silk for painting and calligraphy comprises silk winding and silk doubling processes.

Preferably, the weaving process in the manufacturing process method of the alum-free mulberry silk ecological silk for painting and calligraphy is preferably carried out by a shuttleless loom (rapier loom); the warp density and weft density are 45-52 pieces/CM.

Preferably, the post-finishing 1 in the manufacturing process method of the alum-free mulberry silk ecological silk for painting and calligraphy is carried out by heating and boiling with normal-pressure steam, preferably setting the heating rate at 2-3 ℃/min, controlling the water temperature at 80-100 ℃, carrying out heat preservation and boiling for 0.5-1.5 hours, and controlling the glue retention rate at 90-95%.

Preferably, the pressure of a padder in the manufacturing process of the alum-free mulberry silk ecological silk for painting and calligraphy is 4.5-5.5KG/CM²The rolling residual rate is 50-75%.

Preferably, the heat setting temperature in the manufacturing process method of the alum-free mulberry silk ecological silk for painting and calligraphy is 110-150 ℃, and the cloth moving speed is controlled at 14-16 m/min.

Preferably, the after-finishing 2 in the manufacturing process method of the alum-free mulberry silk ecological silk for painting and calligraphy adopts a method of firstly cloth feeding in an open width manner and then pressing, ironing and heat-setting by an S-shaped trend woolen blanket roller, and is characterized in that: the diameter of the roller of the heat setting machine is 400mm-1.2m, the effective width is 800mm-2.3m, the heat setting temperature is 200-.

The invention adopts 5A, 6A grade white steam filature (such as monofilament 1/20/22D) to wind silk in warp direction firstly, can skip the silk soaking process in the conventional process, then warping (monofilament double-drawing), and then weaving on a machine synchronously with weft direction to form green spun silk, and rolling and forming; compared with the conventional process, the process design is special-the silk soaking process and the silk doubling process are omitted. The method aims to preserve glue and avoid waxing and other surfactants in the silk soaking process, so that the complex and burdensome processes of removing wax and surfactants in subsequent finishing are avoided, the properties of silk finished products are affected by incomplete removal of the waxes and other surfactants, the manufacturing process is completely environment-friendly when the silk is crossed, and the best quality performance for painting and calligraphy is achieved by controlling the glue preserving rate to be 90-95%.

The woven raw silk blank is boiled by steam heating, the steam is heated to 80-100 ℃ and boiled for 0.5-1.5 hours, and then a padder is used for one time (the pressure is adjusted to 4.5-5.5KG/CM²) Then, carrying out overheating setting, controlling the temperature within the range of 110-150 ℃, rolling and forming after the setting machine comes out, and then feeding the cloth into a cloth inspection machine for inspection; compared with the traditional process, the whole process of the step is more convenient and efficient.

The whole process flow specifically comprises the following steps:

1) the 6A-grade white steam filature (monofilament 1/20/22D) is firstly wound in warp direction (the silk soaking process in the conventional process is omitted), then warped (monofilament double-traction), and synchronously woven on a machine with weft direction to form a green spun silk, and then rolled and formed. Compared with the conventional process, the process design purposely omits a silk soaking process and a silk doubling process. The method aims to preserve glue and avoid waxing and white oil series of auxiliary agents in the silk soaking process so as to avoid the complex and burdensome processes of removing wax and white oil and the like in the subsequent finishing, the properties of silk finished products can be influenced if the auxiliary agents such as the wax and the white oil are not removed completely, and the manufacturing process is completely environment-friendly if the silk soaking process is removed.

2) The 6A-grade white steam filature (monofilament 1/20/22D) is firstly wound in weft direction (the process of soaking silk in the conventional process is omitted), then is doubled, is synchronously woven on a machine with the warp direction to form green spun silk, and is rolled and formed. Compared with the conventional process, the process design is specially designed, the silk soaking process is omitted, the wax and white oil series auxiliary agents are avoided, the complex and burdensome processes of removing wax and white oil and the like are avoided for subsequent finishing, the properties of silk finished products are affected if the wax and white oil and the like are not removed completely, and the manufacturing process is completely environment-friendly if the silk soaking process is removed.

3) The woven raw spun silk is boiled in water at 80-100 ℃ for 1 hour by a beam machine and then passes through a padder (the pressure is adjusted to 4.5-5.5 KG/CM)²) And (3) overheating the setting machine, controlling the temperature within the range of 110-150 ℃, rolling and forming after the setting machine comes out, and then inspecting by a cloth inspection machine (the step of post-finishing the silk raw blank completely meets the policy trend requirements of ecological environment-friendly energy-saving water-saving emission-reduction textile dyeing and finishing).

The key process steps of the process which are obviously different from the conventional process are as follows:

1) the white steam filature is preferably selected without a silk soaking process, without a lubricant and any additive, the difficulty of the weaving process is much higher than that of silk soaking, but the inking and water absorption performance of the finished product of the raw silk product reaches the performance functional requirements of painting and calligraphy pens and writing, and no additive is added in the whole process, so that the finished product of the raw silk product is consistent with the trend of environmental protection.

2) The weaving on a shuttleless loom is preferred, and the shuttle loom is not advocated (because the warp and weft density of the shuttle loom does not meet the design requirement of the novel process development).

3) After-finishing of the woven blank silk adopts a specific warp beam machine cooking process method.

4) The green spun silk is directly shaped to change the crystal form structure of the fabric, so that the best use functional performance of the spun silk for painting and calligraphy is achieved.

The spun silk paper finished product prepared by the process has the remarkable advantages that:

1) compared with alum silk and gunn silk in the market, the gunn silk has the advantages of more uniform water absorption, more uniform permeability and more uniform ink absorption when being transported;

2) the problems of bleeding, blurring, burrs and the like easily caused by the alum silk in the market are solved, and the problems of difficult white exposure and water absorption easily caused by the puckery base material and the ink coloring and the contradictory performance are solved.

3) Has good inking quality of raw and cooked rice paper, and has far superior performances compared with rice paper in fastness, tearing strength, curling preservation integrity, convenient collection and carrying, and the like.

4) Is very practical. The material is suitable for high-end-group cloth materials such as calligraphy strokes, sketching, hand-drawn pictures of real silk wallhanging, high-imitation micro-jet technology, jet printing and the like.

5) The whole process is completely environment-friendly, and no chemical auxiliary agent is added. Compared with the conventional weaving process, the respective cohesive force and breaking strength of the warp and weft yarns are easier to weave on a machine after the conventional yarns are soaked by adding additives such as wax, white oil and the like. But the finished product after the process is innovatively manufactured is beneficial to the proper performance and function of the silk paper and is suitable for perfect application.

Compared with the prior art, the novel product prepared by the method has the following advantages:

1. compared with alum silk and raw silk on the market, the absorbent has the advantages of more uniform water absorption, more uniform permeability and more uniform ink absorption when being transported;

2. the problems of ink bleeding, blurring, burrs and the like easily caused by spun silk on the market are solved. And the problems of difficult white exposure and water absorption and contradictory property caused by the astringent taste of the base material and easy occurrence of ink coloring are solved.

3. Has good inking material quality of raw and cooked rice paper, has far superior performances than the rice paper in fastness, tearing strength, curling and storage integrity, convenient collection and carrying and the like, and is suitable for large-scale creation without splicing.

4. The method of the invention is very practical: the material is suitable for high-end-group cloth materials such as calligraphy strokes, sketching, hand-drawn pictures of real silk wallhanging, high-imitation micro-jet technology, jet printing and the like.

5. The whole process is completely environment-friendly, and no chemical auxiliary agent is added. Compared with the conventional weaving process, the respective cohesive force and breaking strength of the warp and weft yarns are not as good as those of the warp and weft yarns in the conventional yarn soaking process; but the finished product after weaving is favorable for the silk quality and performance functions to be perfectly suitable for painting and calligraphy. Description of environmental protection situations: the name of the silk alum-free silk for painting and calligraphy can embody the environmental protection concept, and meanwhile, the silk alum-free silk inherits the environmental protection consciousness in the processing process, and the painting and calligraphy aim is achieved by a physical method, which comprises the following specific steps:

1) the real silk is different from other fibers, the mulberry cannot be polluted by pesticides and other chemical industry when growing within five kilometers around, otherwise, the mulberry leaves can cause death of the silkworms when feeding the silkworms;

2) different from other silk production processes, no chemical auxiliary agent is used;

3) no alum;

4) the post-finishing process does not contain chemical additives, and changes the aggregation state of the fabric crystal area structure by adopting a physical thermodynamic principle method.

In a word, the silk material is natural and environment-friendly, and the whole production process adopts physical means without any additive.

The product obtained by the method is used for creation, teaching, soft decoration, high-grade gift manufacturing and ancient painting and calligraphy copying by painters or painting and calligraphy lovers. The evaluation of a plurality of famous painters is good, the consistency reflects that the painting base material is better than the base material of the painting sold in the market at present, the painting is smooth, the ink is firmly retained, and the color is better than that of rice paper.

Drawings

FIG. 1 is a schematic process flow diagram of the present invention.

FIG. 2 is a graph showing the contrast of crystallinity of a green spun silk according to the present invention at various temperatures.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Detailed Description

The present invention will be described in further detail with reference to examples, which are illustrative of the present invention and are not to be construed as being limited thereto.

Example (b):

as shown in the process flow diagram of fig. 1, this embodiment provides a method of using 6A-grade white steam filature (monofilament 1/20/22D) to warp first, then warp (monofilament double-draw), and then weave in synchronization with the weft. The weft weaving front process comprises silk winding and silk doubling processes; weaving to obtain raw silk, steaming at 100 deg.C for 1 hr by beam machine, and rolling once (pressure adjusted to 5.5 KG/CM)²) And then the forming machine is overheated, the temperature is controlled within 120 ℃, and the cloth moving speed is controlled at 14 m/min. And after the setting machine comes out, rolling and forming, and then feeding the cloth into a cloth inspection machine for inspection. Compared with the conventional process, the process flow has the characteristics of process design, namely, a filament soaking process and a warp-wise filament doubling process are omitted. The method aims to avoid waxing and other surfactants in the silk soaking process so as to avoid the complicated and burdensome processes of dewaxing and the like in the subsequent finishing, the performance and quality of silk finished products can be influenced if the waxes and other surfactants are not removed completely, and the manufacturing process is completely environment-friendly if the silk soaking process is removed.

The test results in the table above show that:

1) and (3) warp and weft density: the warp density of the developed sample No. 2 and No. 3 is close to twice that of the market sample No. 1, and the weft density of the developed sample No. 2 and No. 3 is close to 100 pieces/10 CM than that of the market sample No. 1, so that the uniformity of the ink rate and the ink adhesion rate is effectively maintained.

2) Hardness: the warp bending length and the weft bending length of the No. 2 and No. 3 samples of the invention are both more than 40CM, thereby achieving the stiff and smooth stiffness of the finished silk for painting and calligraphy and having the sound of the sandsand of the silk paper. The No. 1 market sample has no stiff feeling, and the bending length of the test result of the hardness is lower than 40 CM. No. 1 can not achieve the paper-like effect of calligraphy and painting silk.

3) And (3) component analysis: the No. 2 and No. 3 samples developed by the invention do not contain aluminum element, namely, alum-free silk. No. 1 is a silk contrast sample sampled in the market, and the test result is aluminum-containing element, namely, alum silk.

4) pH value: market sample No. 1 had a pH of 6.8, which was slightly acidic. The samples 2# and 3# developed by the invention are just in a neutral range, and are favorable for storage.

5) The formaldehyde test items are not detected, and the ecological environment-friendly requirement is met.

The ink leakage rate detection-test method comprises the following steps: preparing 2% light ink by using Chinese ink, wherein the thick ink is 100% ink, and the sample size is 10cm by 10 cm;

three drops of light ink and three drops of thick ink (the mass of each drop of ink is 0.02-0.03g) are respectively dropped on different positions at a height of 3-5cm from the test sample by using a dropper, and then the test sample is placed on a roll paper to observe the ink leakage condition.

Calculating the ink leakage rate (mass without ink leakage-mass after ink leakage)/mass of ink drops;

and (3) combining the test results of the table with the practical analysis of the writing effect:

1) the 2# process sample writing effect is superior to that of the 3# process sample writing effect, the process implementation is convenient, environment-friendly and low in energy consumption, and therefore the 2# process cooking method after-finishing method is preferred. And secondly, selecting a finishing method of a 3# technological drum type pressing machine pressing method. Both can achieve the even and smooth painting and calligraphy effect of the silk fabric for painting and calligraphy.

2) The market sample No. 1 can not meet the requirements of ink leakage and ink retention of silk for painting and calligraphy. Belongs to the silk which is not used for painting and calligraphy.

The test method comprises the following steps: three samples are tested for XRD diffraction curves, and the crystallinity is calculated by using Peakfit software in a fitting mode.

The following table is a comparison table of crystallinity of silk fabrics treated in different ways:

the following table is an ink leakage rate comparison table of silk fabrics with different treatment modes

The crystallinity test result chart and the ink leakage rate test chart are combined with writing effect actual analysis:

1) the aggregation state of the crystal area of the raw silk is changed by the post-finishing of the steaming method and the heat setting finishing of the pressing method.

2) The painting and calligraphy effect of the invention sample 3# -B (after-finishing by a cooking method) is better than that of the invention sample 3# -C (after-finishing by a pressing method of a roller type pressing machine) is better than that of the invention sample 3# -A (raw blank sample).

The warp and weft density of the woven fabric is 45-52 pieces/CM, so that the warp and weft density process requirement of the product obtained by the method is greatly improved; the problem that the warp and weft density of the shuttle loom cannot meet the design requirement of the novel process development is solved.

In addition, the specific examples described in the present specification may differ in terms of the names of raw materials and the like. All equivalent or simple modifications made according to the principles described in the present patent concepts are within the scope of protection of the present patent. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims

1. A manufacturing method of alum-free mulberry silk for painting and calligraphy is characterized in that: the manufacturing method comprises the following steps:

step one, adopting white steam filature warp-wise reeling above 5A grade, warping, then synchronously weaving on a machine with the weft direction, and randomly transferring into a cloth roller to be rolled into green spun silk rolled silk;

step two, performing physical functional finishing on the green spun silk rolled silk obtained in the step one, uniformly smearing a crystal area of the green spun silk rolled silk, and rolling to obtain finished product painting and calligraphy spun silk to be detected;

the physical functional finishing method is a cooking method or a pressing and scalding method.

2. The method for manufacturing alum-free mulberry silk for painting and calligraphy according to claim 1, wherein the method comprises the following steps: the method for performing functional finishing on the green spun silk rolled silk is a cooking method, and comprises the following steps:

firstly rolling the woven green spun silk rolled silk onto a dense-hole hollowed warp beam, pushing the warp beam of the rolled cloth into a cooking machine, putting a stainless steel disc, and screwing tightly;

after water is added into the machine, the liquid level is checked, steam is adopted to heat at constant speed under normal pressure, the temperature is uniformly heated, and the machine is steamed at normal pressure;

after cooking, pulling the creel onto a cloth vehicle, installing a protection device, and pushing the cloth vehicle to a wet cloth area to pass through a padder; then the silk is shaped by a drum-type heat-setting machine, and then is rolled into a cloth guide roller prepared for reverse idle running to drive a cloth roller idle running in the same direction, and is naturally rolled into finished silk for painting and calligraphy to be detected.

3. The method for manufacturing alum-free mulberry silk for painting and calligraphy according to claim 1, wherein the method comprises the following steps: the method for functionally finishing the green spun silk rolled silk is a pressing method of a drum-type pressing machine, and comprises the following steps:

the method comprises the steps of uniformly and flatly feeding rolled raw silk rolled silk on a plane platen at a constant speed, gradually feeding the raw silk into a high-temperature drum type pressing machine coupled with a reverse combined drum in a mutually-reversed operation mode, slowly discharging the raw silk along two groups of mutually-reversed drums, rolling the raw silk into a cloth guide roller which is prepared for reverse idling operation in a manner of potential transmission to drive a cloth roller which idles in a manner of potential transmission, and naturally rolling the raw silk into finished silk to be detected for painting and calligraphy.

4. The method for manufacturing alum-free mulberry silk for painting and calligraphy according to claim 1, wherein the method comprises the following steps: the white filature is 6A grade, monofilament 1/20/22D or 1/17/19D or 1/27/29D.

5. The method for manufacturing alum-free mulberry silk for painting and calligraphy according to claim 1, wherein the method comprises the following steps:

the warping process is that the monofilaments are drawn after being doubled by a warping machine; the warping tension is 5-7 gram force, and the lowest speed is 120 +/-5 r/min;

the monofilaments enter a bobbin creel and enter a double untwisting pair in the warping process, and the twist is less than or equal to 1.5T/CM;

the warp is guided by a guide rod, a yarn separating frame arranged at the upper layer and the lower layer, and two monofilaments are fed and twisted into one strand, and then the strand is wound on a large round frame or a roller through a fixed-width reed, all the warps on the roller are withdrawn and wound on a beam of loom along with the rotation of the beam of loom during the shaft rewinding, and then the one strand of the warps is reeded in two strands, and the another strand of the warps is healed one by one for waiting for weaving on the loom.

6. The method for manufacturing alum-free mulberry silk for painting and calligraphy according to claim 1, wherein the method comprises the following steps: the weft weaving former process comprises silk winding, wherein when the single silk is 1/20/22D, the speed is 100-120 r/min, the tension of a heavy hammer is 5-7 gram force, and when the double silk is combined with 2/20/22D, the speed is 120 +/-5 r/min, and the tension of the heavy hammer is 7-9 gram force.

7. The method for manufacturing alum-free mulberry silk for painting and calligraphy according to claim 1, wherein the method comprises the following steps: the weaving process adopts a shuttleless loom for weaving, and the shuttleless loom is a rapier loom; the warp density and the weft density are 45-52 pieces/CM; the speed of the rapier loom is 200r/min, and the weft insertion length is 550-600 meters.

8. The method for manufacturing alum-free mulberry silk for painting and calligraphy according to claim 2, wherein the method comprises the following steps: the functional finishing method adopts normal-pressure steam heating and boiling, the heating rate is set to be 2-3 ℃/min, the water temperature is controlled to be 80-100 ℃, the heat preservation boiling is carried out for 0.5-1.5 hours, and the glue preservation rate is controlled to be 90-95%.

9. The method for manufacturing alum-free mulberry silk for painting and calligraphy according to claim 2, wherein the method comprises the following steps: the pressure of the padder for the functional finishing method is 4.5-5.5KG/CM²The rolling residual rate is 50-75%;

the heat setting temperature is 110-150 ℃, and the cloth moving speed is controlled at 14-16 m/min.

10. The method for manufacturing alum-free mulberry silk for painting and calligraphy according to claim 2, wherein the method comprises the following steps: the diameter of the roller of the heat setting machine is 400mm-1.2m, the effective width is 800mm-2.3m, the heat setting temperature is 200-230 ℃, and the cloth moving speed is controlled at 14-18 m/min.