Fur printing technology (on)

The fur printing is the process of forming the color pattern on the fur by using the dyestuff or paint through the printing plate and through the physical and chemical reaction. For example, the rabbit skin, the rex rabbit skin, the suede skin, the sheep shearing skin, etc. can imitate the leopard cat, the leopard, the tiger Patterns and other patterns or plant patterns can be used to make collars, hats, clothing, trims and more. These printing products are very popular in domestic and foreign markets.

The printing of the suede printing machine and the printing on the hand, this article focuses on the introduction of hand-printing, the tools used are mainly printing plate, roll (or scraper) and brush. Printing plate production requires a large metal frame or a plastic frame or a wooden frame to be stretched with a nylon (or polyester) wire mesh, and a screen meshed part is made up of empty mesh, and no pattern is applied to the polyurethane.

When printing, the color paste is scraped through the mesh and printed on the fur. In order to reduce the cost, it can also be cut into blanks using materials such as tinplate, zinc plate, and plastic plate. When printing, the printing plate is covered on the fur, the color paste is dipped with a brush, and a brush is applied on the printing plate to obtain the desired pattern on the fur. The printing plate specification depends on the product condition. The large printing plate is similar to the size of a suede tweezers (120cm*62cm). It can also be used for a single-leaf printing with a rabbit-like printing plate. When imitation tiger stripes need to be first dyed background color, preparation of a single color paste, imitation leopard also must first dye the background color, need to be equipped with two kinds of color paste, two printing plates (flower core board, black circle plate), imitation plant pattern flower heart is pink Or about color, the leaves are green or black, whether it is the center color, or the outer ring color, the color paste material consists of dyes () or paints, pastes, additives, hair-preserving agents, coloring agents and fixing agents, etc. .

1 printing category

1.1 Direct printing

1.1.1 screen printing

Use low humidity dyes, such as oxidation dyes, TIPPING DYES, BRUSHING DYES, to print on the wool through double boards or veneers.

1.1.2 stencil printing

The printing plate is covered on the quilt or on the leather plate, and the prepared slurry is brushed on the fur with a brush.

1.2 faded printing

The printing plate is covered on the quilt, and the fading solution (made of H2O2) ammonia water, wool-preserving agent, and auxiliary agent is prepared and brushed onto the quilt to obtain the desired pattern.

1.3 pull out white printing

1.3.1 dyeing with acid dyes with LOWACENE DYES, LOWACENE ASSIST BH, LEVEL A, formic acid, water dubbed dyeing liquid, temperature 60-65 degrees Celsius, time 2h.

1.3.2 Cover the plate with the dyed wool.

BLEACH LCN-1 or LCN-3110g.
Formic acid 400ml
Water 500ml
Scrub or spray the whitener onto the blank board.

1. 4 smooth leather leather printing

On the Smooth Surface of the leather, the liquid (direct dyes, metal complex dyes, resins, etc.) is printed with a brush or spray.

1. 6 roll printing

The uneven pattern (regular or irregular), such as crocodile pattern, crispy pattern, etc., is generated on the surface of the leather by a flower board or embossing machine.

1. 7 transfer printing

The printing paste is first printed on paper, printed as a transfer paper, and the front surface of the transfer paper is closely attached to the leather surface. Under a certain temperature and pressure, the paper is pressed for a certain period of time so that the flower shape on the paper is transferred to Leather surface.

2 Dye screening

The following points should generally be considered when selecting printing dyes:

(1) Colour matching properties of dyes

When printing, it is necessary to select dyes with similar properties for color matching, that is, the affinity and diffusion rate of the skin fibers are almost the same to effectively control the color shade.

(2) Leveling performance

Relatively speaking, a certain dye has a higher affinity on the skin fibers, a lower diffusion rate, and poor migration, which inevitably causes a leveling agent to solve the leveling problem. When printing, this problem is not significant, as long as you consider the use of level dyes.

(3) Various fastness indicators

Acid dyes, oxidative dyes, TIPPING DYES and BRUSHING DYES have different printing effects on the hair. If acid dyes are used, conditions such as temperature cannot meet the requirements. The dyes cannot diffuse and bind inside the fibers, but only adsorb on the surfaces of the fibers. All indicators of fastness are not at all relevant and therefore should not be used. Oxidation dyes, TIPPING DYES, etc. can be combined with wool fibers under low temperature conditions and are suitable for fur printing.

(4) Dyeing properties of dyes

Dyeing performance Liu's dyes can be printed in dark colors. Conversely, only light colors can be printed. The amount of neutral dyes is large. Instead of relying on salt bonds, it also depends on hydrogen bonds and van der Waals forces so it can be used. Dark color printing.

To sum up, it is best to use direct dyes or liquid ganchaola dyes for leather printing. Only aminated dyes, TPPING DYES, and BRUSHING DYES can be used for hair prints.
(to be continued)

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