Use attention

1. Is the pencil lead poisonous? In fact, the pencil lead is not toxic, lead is toxic, and the main raw material for making the pencil lead is graphite and clay, so the pencil lead is non-toxic. The main components of the pencil refill are graphite and clay. Graphite is a scaly solid with a…

Pencil pen logo

The hardness mark of the pencil lead is generally indicated by “H” for a hard pencil, “B” for a soft pencil, “HB” for a soft and hard pencil, and “F” for a pencil with a hardness between HB and H. Arrangement (from soft to hard) 9B, 8B, 7B, 6B, 5B, 4B, 3B, 2B, B, HB,…

Pencil making

Divided into two parts: pencil cap and pencil rod: the appearance of the pencil cap decoration material is mainly polyester material, and the manufacturing process can be divided into mold making, offset printing, assembly and other processes to complete it. The appearance of pencil pencil decoration materials mainly includes nitrocellulose pencil paint, printing ink, electrochemical…

Use and maintenance

New pen to hand Generally, the pen can be used normally after it is applied to the water. It is not necessary to take a new blisters as the individual has said. Of course, sometimes it is inevitable that you will encounter a situation where the pen does not have water or the tip of…

Selection method

When we use the pen, some parameters are not visible. But we can still use some techniques to get the pen good or bad. Let’s take the best-selling pen on the market as an example. A. The tip of the pen can pull out the pen holder and move the pen tip on the white…

Pen type

There are many types and models of pens. According to the composition of the pen nib, it can be divided into three types: gold pen, gold pen, and ink pen pen. Gold pen The nib is made of gold alloy, the nib is soft, the elasticity is good, and the hand feels comfortable. However, the…