Printing and dyeing I don't understand

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Basic knowledge of printing and dyeing

The first lecture

Basic knowledge of printing and dyeing

Fabric printing of the Process:

(a) the problem of color-set: the pattern pattern on the fabric is printed color by color. "Color set" refers to the same color in the pattern by the merging of color processing. A film that provides one color is called "a color set".

(ii) the meaning of other relevant terms:

1, the printing method

The fabric printing classification can be broadly classified according to the printing method and printing process.

Textile printing according to the printing method can be divided into screen printing, type printing, roller printing, transfer printing and so on.

Screen printing according to its shape can be divided into two kinds of round mesh, flat screen, flat screen printing can be divided into flat screen printing and handmade board. For simplicity, it is customary to screen printing is divided into round mesh, flat mesh and board.

Textile printing according to the printing process can be divided into direct printing, pull-dyeing printing, anti-dyeing printing.

Flower screen production: after the completion of the black and white draft, the next step in the process is the production of printing screen. In the screen to produce more methods of flower shape, there are photographic method, anti-paint method and modern laser mesh method, of which the photographic method is currently the main method of printing screen production.

2, the size of the problem

Circular screen printing warp size that is the circumference of the screen, generally about 642mm.

Flat screen printing machine requires the warp to be set between 700-1000mm, is a range of requirements.

Manual desktop printing on the warp direction of the flower back to the size requirements of the more rigid, set at a multiple of 330mm or an integral divisor of the number of weft dimensions with the width of the desktop.

It seems, round screen printing, table printing, the size requirements are very strict.

Any kind of printing method has a clear size requirement for the warp direction, so we should distinguish the warp direction and weft direction of the cloth.

3, warp and weft

The length of the cloth is the direction of the warp direction, usually referred to as the direction of the width of the door to the weft direction, to determine the warp and weft direction of the cloth usually have the following

Methods:

(1) If you can distinguish the edge of the cloth, the length of the edge of the cloth is the direction of the warp direction.

(2) If there is a sewn edge, the direction of the sewn edge is the latitudinal direction, because the sewn edge is a trace of the joining of two pieces of cloth.

(3) When there is no cloth edge and sewing edge, you can observe the cloth threads to judge. Generally, the warp is dense, the weft is sparse, the warp direction is less stretchable the weft direction is more stretchable, the cloth threads in the warp direction are easier to draw out than in the weft direction.

(4) The direction of the length of the dress is the direction of the warp. Curtains hang down in the direction of the warp direction. It can also be judged by observing the effect of the pattern.

4, the flower back problem

The size of the printing screen is required for both the warp and weft directions. Weft direction can be printed once, while the direction of the warp need to be infinite loop down, a time can not be printed, and the last time and the next printed flower shape must be connected. The pattern on the cloth are arranged by a minimum unit according to a certain law, never the whole horse on the pattern are different.

Flower back (minimum flower back): the smallest unit that makes up a regular pattern cycle.

Flowers back to the joint: so that the pattern in the warp and weft of the cloth can continue to extend the process of processing. A pattern unit needs to be spliced with each other up and down to meet the printing requirements of the whole fabric. Therefore, the pattern design must ensure that the pattern in the warp and weft direction can be connected to each other and become a whole.

In order to make the pattern pattern is not dull, the joints have flat, jumping. Any kind of printing machine on the size of the warp direction requirements are certain, the flower back size must be required by the printing machine size as a standard and change.