Some basic knowledge of printing
A basic printing process
Color separation—screen drying, screen making—making S/O, DP office—dyeing base fabric—printing bulk goods—post-processing—finished product
Two definitions
(1) Computer color separation:
It refers to the original printing pattern of the customer, the number of printing colors, the effect, and different factors such as different fabric types, printing pigment characteristics, actual production effects after screen making, color coordination, printing techniques, etc. Carry out color removal and retouching work to ensure that the final result is a process that can not only produce large quantities of goods smoothly, but also reflect the effect of the customer’s original drawing to the maximum extent.
(2) Printing: Here we mainly talk about fabric printing. Specifically, the printing paste is printed on the fabric through the printing screen with a scraper or magnetic stick to form a certain pattern. pattern.
(3) S/O (strikeoff): refers to the initial work (sample) produced in the printing process and handed over to the customer for approval, which is equivalent to the dyeing factory Room type L/D. The usual sizes are 9X9 inches, 12X12 inches, 16X16 inches.
(4) longS/O (long code processing): Usually the quantity exceeds one or several yards, and it needs to be machine-printed or hand-printed (customers sometimes use long codes) Directly make it into ready-made clothes to see the effect).
(5) Return (repeat): Printing patterns generally appear in cycles, and one of the cyclic patterns is called a “repeat”. For example:
(6) Broken edition (unit printing) (engineeringrepeat): Comparison Large return, one piece of clothing can be produced in one version, positioning printing, etc. can reduce costs. The pattern that was originally made on the rotary screen can be printed on a flatbed machine.
(7) Network number: used to distinguish different flower types. The flat screen is represented by “S” + number; the round screen is represented by “R” + number
(8) Combo: refers to the same pattern but different printing colors in the same screen number the difference.
Three printing machine types
(1) Flat printing machine ): The grid performs intermittent lifting and lowering movements
A printing action: the guide belt and cloth travel together – the flower board descends – scraping prints – the flower board lifts – the guide belt and cloth move together Travel – Separation of the guide belt and cloth
The relationship between B return and printing color:
Due to the size of the flat screen frame Four types: 29″, 36″, 40″, 44″, so it is recommended to return to
a 24-25 inches can print up to 16 colors (called small frame)
b 36-37 inches can print up to 7 colors
c 40-41 inches can print up to 6 colors
(2) Rotary screen machine: the screen cylinder performs continuous rotational motion
A printing action: The guide belt and the cloth travel together, and at the same time the mesh cylinder rotates continuously at the same speed – the guide belt and the cloth are separated
B Since the circumferential length of the cylinder of the cylinder is 640mm, the cylinder is straight The return position after placing must be exactly the number of complete integer return positions within the circumferential size
C Our factory’s rotary screen machine can print up to 16 colors
D The biggest difference between rotary screen printing and flat screen printing is that the scraping device of the rotary screen is fixed, while the rotary screen cylinder rotates. That is, the relative movement between the rotary screen and the scraper causes the color paste in the rotary screen to evenly penetrate through the mesh and print on the fabric.
The type of printer to choose is mainly determined by the position and pattern of the customer’s pattern. </p
