Pencil is a special pen for writing and drawing and sketching. It has a history of more than four hundred years. Among them, the pencil for drawing and sketching is divided into many types. It is divided into three stages of development, which are divided into graphite and wooden. Penholder, pencil with cap; in addition, its color has stripes such as red and white, black and white, yellow and black. We also have filing folders, notebook, ballpen, pencil that can be wholesaled, and any logo, size, color, style, packaging, etc. can be customized. The price is cheap, I hope you are interested.
There are two ways to use caution：
1. Is the pencil lead poisonous?
2. Is the pencil shaft metal poisonous?
1. Is the pencil lead poisonous?
In fact, pencil leads are not poisonous, lead is poisonous, and the main raw materials for making pencil leads are graphite and clay, so pencil leads are non-toxic.
The main components of the pencil core are graphite and clay. Graphite is a scaly solid with metallic luster. Among them, there are carbon-carbon chemical bonds. The layers are Van der Waals forces. The carbon-carbon chemical bonds are very stable. It’s very difficult. That’s why diamond and graphite are both made of carbon, but the physical properties and prices are very different. There is nothing in the human body that can break the carbon-carbon chemical bond, so it’s safe to say that the pencil lead is safe (unless The clay added inside is harmful to human health).
2. Is the pencil shaft metal poisonous?
The appearance of the pencil shaft has a wrapper mold or the use of pencil paint technology, which can protect the pen shaft on the one hand, and increase the beauty on the other hand. However, the pigments will contain traces of heavy metals. Proper.
The pencil is divided into two parts: a pencil cap and a pencil shaft: the exterior decoration material of the pencil cap is mainly polyester material, and the production process can be divided into molding, offset printing, assembly and other processes to complete it. The main decorative materials for the appearance of pencil shafts are nitrocellulose pencil paint, printing ink, electrochemical aluminum foil, rubber head and aluminum hoops. The production process can be divided into pencil board, lead core, pencil shaft, finished product decoration and other processes.
