By color ⑴ Monochrome ballpoint pen: This is the most common ballpoint pen, often in blue, black, red, etc. ⑵ Two-color ballpoint pen: generally red and blue two-color. ⑶ Three-color ballpoint pen: red, blue, and black. ⑷ Four-color ballpoint pen: red, blue, black, and green. In addition to these four, there are six-color, eight-color, and…
The main components of the ballpoint pen ink formulations of various colors include dyes, film formers, solvents, dispersants, and other additives. The basic ingredients of the formula: dye 5%-25% film former 5%-15% solvent 30%-60% dispersant 5%-20% other additives 2%-10%.
1. Go to a regular store to buy stationery products produced by regular manufacturers. Generally, regular supermarkets or franchise stores will choose regular channels for purchase. 2. Try not to buy rubbers with cute shapes and fragrances as their selling points. Often, the more complex the process, the more chemicals are added. 3. When purchasing,…
1. Ordinary eraser Ordinary erasers can be divided into 2b erasers and 4b erasers. They can be used to wipe pencil writing and are the most common type of eraser. 2. Sketch eraser The erasers used in sketching and painting can be divided into art erasers, plastic erasers and high gloss erasers. The art erasers…
1. Principle It removes handwriting by absorbing graphite. This kind of eraser can not only erase handwriting (in fact, it can accurately remove handwriting), it can also be used to highlight important parts or make the work more detailed. However, it is not good at removing large areas of handwriting, and it will stain or…
1. There are two types of workbooks on paper: ordinary type and eye protection type; 2. There are four types of homework books: Chinese grid books, mathematics grid books, English four-line grid books, and art blank books; 3. There are four types of binding: paperback, threaded, loose-leaf, and purse; 4. There are two books that…
International standard format includes folio, 16 karats, 32 karats, 64 karats. The workbook is generally 16 karat, that is, A4 (16k) 297mm×210mm. There are also A5 (32k) 210mm × 148mm, A6 (64k) 144mm × 105mm, A2 (2k) 420mm × 594mm, etc.
