Knowledge Of Burnt Out Printing Process

With polyester as core, cotton, acetic acid, viscose, linen and so on are used.

They are coated or blended separately and woven into fabric.

Then, according to their different properties of acid stability, the sour pulp is corroded and carbonized on the above fabrics, and its acid resistant fibers (i.e. cotton, acetic acid, viscose, hemp and other fibers) retain their acid resistant fiber polyester, so that they become plucent patterns. This process is known as burnt out flowers.

In the printing of sour paste, it can also be printed with white paint as the edge of the rotten flower part, or add acid resistant disperse dyes in the sour paste, so that the polyester part of the pattern part is coloured, or the first printing pigment is used as the anti printing paste, then the overprint of the sour paste, the printing effect is produced in the printing part, or the fabric is dyed before the rotten flower, then rotten flowers, etc., so that the shape of the flower is rich and colorful.

Rotten flower craft

The burnt out process is a printing process that prints the corrosive chemicals (such as sulphuric acid, ALCL3, etc.) on the surface of two or more than two kinds of fibers, which are damaged by drying and processing to form a certain fiber component.

Generally used in velvet fabrics.

This pattern or concave or convex is orderly, or plucent, decorative.

It is also possible to add appropriate tolerable dyes to the printing pulp, and to stain another component fiber while getting rid of a fiber component, so that the color rot effect can be obtained.

Burnt out flower

It was originally used for silk and its interwoven fabrics, such as burnt out silk, Qiao Rong and burnt out velvet, then used for burnt out polyester / cotton fabrics and other fabrics.

Rotten fabrics are woven or blended by two different fibers, one of which is destroyed by a chemical agent while the other is not affected, thus forming a special style of burnt out printed cloth.

Usually acid resistant fibers such as silk, nylon, polyester and other fibers, such as viscose fiber and cotton, are woven or woven into fabrics, and then printed with strong acid. After drying, cellulose is hydrolyzed and carbonized by strong acid. After washing, they get plucent and concave and convex patterns.

With the popularity of the regression, rotten design is often used in large quantities of decorative fabrics such as curtains, bedspreads, tablecloths and so on.

Acid is good, acidic salts such as aluminum sulfate and sodium bisulfate can also be used, but the effect is not as good as sulfuric acid.

The printing paste should be able to withstand strong acids and has good penetrability, clear print and easy washing.

This kind of paste contains white dextrin, synthetic dragon glue, oil / water emulsion paste and so on.

After printing, it is dried, dried at more than 100 degrees, washed in rope, and removed carbonized.

If the drying temperature is too high, the printing area is dark brown and hard to clean. When the temperature is not enough, the printing area is white and opaque, indicating that it is not effective enough to wash and remove.

Check whether the baking temperature is suitable, the fabric can be moved by hand under tension condition, so that the residue can be separated immediately.

The method of direct printing can also be used for rotten printing.

The latter is pre printed with paste. After drying, it is pickled with acid and steamed to remove the ground color part, which achieves special effects.

The quality requirements of rotten flowers are manifested in the pparency of rotten flowers. The contour of the flower pattern is clear, impermeable, not flowered, many flowers, continuous lines, beautiful flowers and accurate plates.

In the process of rotten flowers, the pattern effect can be more eye-catching if the nested printing or color printing is applied to the remaining fabric areas.

When designing the flower pattern, avoid excessive, too small points, lines and surfaces, so as to prevent the flowers from losing flowers and the disadvantages of flower contour lines.

For the design of the combination of burnt out and printing, when the connection between burnt out and printing parts should be done, proper gaps should be kept to prevent the mutual infiltration of burnt out paste and printing paste when damaging printing, and destroy the effect of flower pattern.

It is not appropriate to register too much.

The choice of burnt out grey cloth is mainly made of the following kinds of burnt out grey cloth on the market: Polyester / cotton core cloth, good pparency of rotten flowers and suitable for high-grade rotten flowers.

Polyester / cotton blended fabric has poor pparency in burnt out parts and can be used for general burnt out products.

When designing the manuscript, we should pay attention to the following questions: when the rotten flowers are drawn, the appropriate gap should be left at the flower type wiring, and the lines should be fine, symmetrical and accurate.

Generally speaking, plain weave weave is used in the tissue design of rotten fabric. The following four problems should be paid attention to in fabric weave design.

1. selection of fabric tightness.

The density of burnt out fabric includes two concepts. One is the tightness of fabric core spun yarn, the other is the tightness of fabric screen part. Two.

The fabric is too tight, weaving is difficult to do.

The small screen can easily cause the displacement of warp and weft.

2. the selection of reed number for weaving is aimed at the uniform arrangement of weft knitted fabric and weft yarn. Generally, the reed with higher reed number is generally suitable for improving the quality of products.

In actual production, it is better to wear a warp per reed when wearing reeds, and two warp yarns are at most for each reed.

The choice of twist coefficient of 3. core spun yarn is closely related to the twist coefficient of core yarn and the quality of rotten fabric.

If the twist factor is too small, it will make the filament feel uncomfortable and lack the silk screen style. At the same time, after twisting, the product will easily flab and affect the service life. In the weaving process, the outer part of the cotton part is also easy to cotton ball because of friction.

If twisting coefficient is too large, it is easy to produce kink yarn in weaving.

Attention should be paid to the following steps in the processing of burnt out printed fabrics.

1, when the machine enters the printing and drying room, it needs to be flat and not wrinkled, otherwise it will cause carbonization unevenness.

2. After carbonization, the fabric will be released in a timely manner, so that the heat will disperse rapidly, so as to prevent the residual acid from eroding and cause the strength to drop.

3, after printing, semi products in the storage process, the residual acid easy to absorb moisture in the air and extend each other, resulting in the outline of the flower pattern is not clear, after carbonization is difficult to eliminate, therefore, semi products are not suitable for storage.

4, when printing the sour paste, choose the big round mouth scraper, scrape two knives, scrape the color paste to ensure its permeability.