Screen printing belongs to stencil printing, which is carried out by the extrusion of the squeegee, so that the ink is transferred to the substrate through the mesh of the graphic part to form the same graphic as the original.

The main features of silk screen:

  1. The ink layer is thick. Advantages: bright colors, giving people a very full feeling, strong sense of three-dimensional, adapt to the size of the plane or object surface of the field, book and other patterns. Lack of ink consumption is large, about 3 times thicker than offset printing, light curing speed is slow, ink film shrinks more surface, easy to lead the shrinkage of the disk, and even buckling, resulting in quality problems.

  2, the printing pressure is small. Screen printing is soft and affluent, and the printing pressure is small, which has little effect on the internal meaning of the disc and helps to take care of the disc.

  3. Low precision. Due to the limitations of screen printing technology and raw materials, the precision of screen printing images is 80-120 lines/inch, and the replay range of dot-tones is generally 10%-85%, so the product has a fineness and layering.

Offset printing is a kind of lithographic printing. It is very simple to say that offset printing is the printing method of transferring the graphic on the printing plate to the printing substrate by means of rubber (blank), which is also the existence of the blanket. name.

The main features of offset printing:

  1, the printing graphics replay effect is good. The attribution indirect transfer method is to transfer the graphic on the printing plate to the blanket and then transfer it to the printing surface of the optical disc. Because of this, the offset of the offset printing dot is small. Waterless offset printing, the biggest unique feature is that it does not need ink balance, and the structure of waterless photocopy is relatively fine, the number of lines can reach 175-200 lines/inch, the printed pattern is clear, the texture is strong, the color replay it is good. For example, when printing a little over-color, the effect is better, and it is suitable for graphic and text with characters and scenery.

  2. The ink layer is thin. The ink layer is usually 2-3μm, compared with the silk screen printing, the ink layer is thin, and the stereoscopic effect is poor. Correspondingly, the ink light curing speed is faster, the ink consumption is small, and it is not easy to induce the disk deformation due to the shrinkage of the ink. It has little effect on the flatness of the disc.