20 tips for success in wireless binding

1. Select the correct paper

Non-coated paper has more exposed fibers than coated paper, and it is easier to bond with adhesive; while coated paper with more sizing, the paper is hard, the slit is smooth, bright, and the adsorption to the adhesive is poor, thus increasing the binding. Difficulty, but can improve the quality of the glue layer, increase the temperature of the glue, increase the depth of the groove, density, and reduce the angle between the edge of the groove to achieve good binding quality. It should be noted that if the paper weight exceeds 150g/m2 and the book block thickness exceeds 15mm, it is recommended to use the lock-bonding process; the recycled paper is shorter than the original pulp paper, and it is not easy to bond with ordinary adhesive. If you are not sure, you should test the paper first.

2. Pay attention to the direction of the paper

After the paper absorbs water and then dehydrates, the radial change of the paper fiber is greater than the longitudinal change. Therefore, the direction of the silk of all paper materials including the text should be kept in the same direction as the back of the book, so as to avoid the unevenness of the book core and the book core cannot be spread when flipping through. The flat, book back has a short service life, and the incision outside the book is curved. In the case of folding, if the direction of the winding of the paper is inconsistent with the back of the book, the crease will be uneven, and the fiber will be easily broken. Moreover, the above symptoms tend to be severe as the amount of paper increases.

3. Avoid full-surface light

The paper fiber must be directly bonded with the adhesive to bond firmly. The signature of the full-surface light, whether it is water varnish, UV varnish, varnish or wax polish, will be repelled by the adhesive. The combination is not strong. For this purpose, the glazing area should be at least 3 mm from the finish.

4. The inner seal is not covered with film, and the printing and glazing are avoided within the indentation line.

The bond between the cover and the book block is important, and it should be guaranteed that there is no ink in this area to avoid glazing and filming. For the inner seal of total bleeding, a blank of 1.5 mm can be left at the seam of the book block.

5. Cross-page images and lines must be aligned

If the folding is not correct, the binding phase is difficult to remedy. Therefore, at least 3mm of blank should be left so that the image of the page can be pulled into the inside of the book.

6. The layout should be consistent

All signatures, inserts, sticky pages, and sets of pages should have a certain margin.

7. Accurate calculation of book back thickness

In order to deepen the reader's visual experience, many designers have specially designed the color and style of the back of the book. The color of the cover and the back of the book are often different, but this elaborate design may be defeated due to the inaccurate thickness of the book back. Therefore, you must first make a blank binding sample before making the cover design. Because the papers used by different manufacturers are different, the thickness of books may be different even for the same brand of paper. In addition, changes in temperature and air humidity will also affect the thickness of the book block.

8. The cover has a suitable hanging edge

The hanging edge of the cover can hold excess glue. In order to improve production efficiency and quality, the ceiling and the foot of the cover should have a hanging edge of 3mm or more.

9. Protect the outer cover

Covers and back covers printed with black ink or metallic ink are preferably coated or UV glazed, at least with a calendering process. If you choose a film, you should choose a thicker, flatter film. Films with different transparency have an effect on color balance. Bright, matt or matte films can be used as needed. When coating the film, first ensure that the surface of the printed sheet is clean, avoiding the melting of the toner caused by high temperature, resulting in foaming and wrinkling of the film. And the film should not be pulled too tightly, and it will be divided after 4 hours after rewinding to ensure that the cover of the film is not curled. Try not to use polypropylene film because it is very thin and easy to scratch. Under normal circumstances, several samples can be coated first, and the effect can be confirmed before batch processing.

10. Design signature folding

Subtract the conventional 3mm milling back and extend the label to the book block by 3mm, so that the label can work better. Thick paper of 70g/m2 or more is designed to be three-fold or two-fold to ensure the page number and alignment of the page image. Coated paper color pages must be dry and thoroughly folded, matched, and cut, otherwise the graphics will stick.