First, the cover material
Leather: The genuine leather of the book, usually cowhide, sheepskin, crocodile skin, ostrich skin, etc. The most commonly used in this volume is cowhide. Cowhide is divided into the first layer of leather and the second layer of leather. The price of the first layer of leather is much higher than that of the second layer of leather. The price of imported leather will be much more expensive than that of domestic production. The texture of the first layer of leather has not been treated, it is a natural lychee pattern, and the surface of the artificially treated and modified leather will show various lines. The second layer of dermis and the surface layer are all artificially corrected. Today's leather repair process is very advanced and the level is very high. Generally speaking, the second layer of leather, no first layer of wear-resistant, but not all of them, high-level two-layer leather, repair of wear resistance and leather is almost the same, and even good or bad leather, naturally, the price is also expensive.
Imitation leather: microfiber, imitation leather, mid-range imitation leather, PU, PVC leather. The price of microfiber is basically the same as the price of second-layer leather, and the softness, toughness, and wear resistance are all excellent. Artificial leather is an artificial resynthesis of genuine leather materials, and the quality is also very good. The difference between PU and PVC is mainly from the production process. PU softness and wear resistance are better than PVC, and the price is several times that of it. That's just in general, though. For example, the LV notepad uses PVC, but its price is at the level of luxury.
Second, the quality of the paper
There are generally two types of paper. One is beige Dowling paper, the other is pure white wood pulp paper, the quality of the two kinds of paper, in the same kind of paper, belongs to the superior quality, there are imported paper from Japan and South Korea, domestic products have the best paper of first-line brands such as Sun 21, Jindong, etc., and there will be no problems such as ink bleeding and color change for a long time.
Third, the thickness of the paper
There are two thicknesses commonly used, 80 grams and 100 grams. In fact, gram does not represent the thickness of the paper, but represents the density of the paper. 80 grams of paper is a little thinner than 100 grams of paper, and about the same thickness as our usual writing paper. Both kinds of paper can be used to make inner pages, the difference is that 80 grams of paper, because it is thinner, the strokes will be softer, and the feeling of writing will be more comfortable. The 100-gram paper is more stiff and stiff, and the sense of writing is not as good as 80 grams, but it looks high-end and has its own advantages.
Fourth, the color of the paper
Beige Dowling paper, with a very soft color, is the first choice for inner pages for those who like to write. Pure white paper, white has a stimulating effect on the human eye in strong light, looking at white paper for a long time will make the eyes tired, easy to tears.
Fifth, the fluidity of the paper
The smoothness of paper writing is very important, which is very important with the process of making paper (sizing), and a good paper surface must be smooth and flat, and the writing is smooth. The paper is not of high quality, the writing has an astringent feeling, and the paper has more noise.