The main components of the lead core of the pencil are graphite and clay. According to the national standard, pencils are divided into 18 models according to the graphite concentration. In the current standardized test in our country, the computer can only read the pencil handwriting with a lead concentration of 2B. Too thick or…
Advantages: rich in layers, can go in-depth, and paint in detail. The hardness mark of pencil lead core generally uses “H” to indicate a hard pencil, “B” to indicate a soft pencil, “HB” to indicate a pencil with moderate hardness, and “F” to indicate a pencil with a hardness between HB and H. Arrangement (from…
1. Classified by form The types of pencils include: “log penholders”, “sharpened penholders”, and “pencils with caps”. “Ordinary penholder” means that the pencil manufacturer presses the lead of the pencil with a wooden rod. This kind of pencil requires the consumer to sharpen the nib before it can be used. In addition, there is a…
The pencil processing is as follows: Pencil board processing: 1. Unpack and cut the logs, cut squares and sew them into wooden blocks, and cut them into pencil boards with a board cutter after hydrothermal treatment. The length of the board is 184mm, the width is 73mm, and the thickness is 4.8～5.2mm. After heating (60～120℃)…
1. The colors are rich and bright. 2. Part of the color pen shell can also be divided into a number of vertical watercolor tanks, each tank is filled with different watercolors, so that the color pen can write different colors of calligraphy and calligraphy or calligraphy and calligraphy with different patterns at a time.…
1. Type: Monochrome color pen The monochromatic color pen is composed of three parts: the barrel, the nib, and the refill. The refill is filled with color water. 2. Two-color color pen A two-color-colored fountain pen, composed of three parts: a pen barrel, a pen tip, and a pen core. The pen tip is divided…
Color pens can be expressed with lines, such as painting landscapes. First, use a pencil to lightly draw the outline of the tree, and also draw the intersection of the earth and the sky. Then fill the tree with light green and horizontal line segments, Don’t be too dense, be sparse, or you can’t reflect…
Fabric-All imported ultra-high-density 600D nylon. Strong resilience. All fabrics can only be used after passing the waterproof and decolorization test and can withstand polishing up to 6000 revolutions. Hard and durable. Zippers-All zippers have passed the honed test. According to statistics, each student uses the zipper of the schoolbag about 25 times a day on…
1. Buy tailor-made. Pay attention to whether the size of the schoolbag is suitable for the height of the child. Consider the small schoolbag and choose the smallest schoolbag that can hold your child’s books and stationery. Generally speaking, the schoolbag should not be wider than the child’s body; when you carry it on your…
The staple specifications are: 26/6, 24/6 (369), 10#, 23/6-2; the sealing staples are: 35╳16, 18, 19, etc. There is at least one stapler in every office. It provides us with an ideal way to bind many pages together and store them. I believe that many students also have staplers in their homes. In fact, the…
