I watched my children do their homework someday. He began to
learn to write and was very clumsy and hard as if I was painting! It occurred
to me that if you use a thicker pencil, you don’t have
to work so hard! So I’ll share it with you!
1. Classify according to the material used in the pencil
pole.
It is divided into wooden pencils, plastic pencils, paper
pencils, and mechanical pencils.
1) Wooden pencil
Traditional pencils are wooden pencils.
Here it is a history, there was a carpenter named William Monroe in the United
States. In two wooden slats, he engraved with a groove, a black lead core was
embedded, and two wooden slats were stuck together to make the world’s first
pencil, which is the most common and practical wooden pencil.
2) Plastic pencil
Traditional pencils are wooden pencils made from wood. But,
the raw material generation cycle is slow and the production process is
complicated. Plastic pencils are plastic (PS) as pencil raw materials, which do
not cut down trees and protect forests.
The plastic pencil has many advantages over wooden pencils:
It’s not easy to break the core when the plastic pencil falls
straight from a high place.
The curls from the sharpened plastic pencil can be connected
to a flower-like shape. If the plastic pencil is damaged or discarded, it can
be recycled and redone (I can make a new pencil for you if I can collect these
curls).
If the plastic pencil is broken, there will be no wooden
penstocks and thorns, and there will be no harm to children.
The shape of the plastic pencil is diversified and can be
customized by customers.
Plastic pencils can be used as erasers.
Safe and non-toxic exported to Europe, the Americas, and the
Middle East. All environmental safety tests can be passed, and they have much
higher requirements than China.
Raw materials come from a wide range of large, safe and
friendly PS plastic manufacturers in China.
It’s not as convenient to write as wooden pencils. At
present, there are only 2B, HB, and H pencils on the market that meet the
hardness and softness requirements.
The production process has been reduced by at least half,
and all costs have been much lower, which can compete with the wooden pencils’
market.
3) Paper pencil
The production process of newspaper pencils is to tidy up
the old newspapers, press them with cement prefabricated parts and other heavy
objects. Then, according to the size of the pencil, the old newspaper was cut
into six parts, the graphite pencil coil was glued to the top of the cut
newspaper, the newspaper was soaked in special glue, passed through a special
pencil machine, and an old newspaper became a hard pencil.
Recycled paper is a paper produced from waste paper, which
is broken, decolored, and pulped through a variety of processes. The
pencil-making process is the same as newspaper pencils.
4) Mechanical pencil
Mechanical pencil is a pencil whose spring returns to its
original position after the pressure is released. Mechanical pencils are
divided into thick core and fine core mechanical pencils according to the
diameter of the pencil core. According to the core-out method, it can be
divided into core falling mechanical pencil, rotating mechanical pencil,
pulsating mechanical pencil and automatic compensation mechanical pencil.
The falling core type automatically discharges the lead core
by the gravity of the lead core. The rotary type conveys the lead core by
rotation.
The pulsation type (press type) conveys the lead core by
pressing, and the structure has a single press type, that is, the lead core is
produced by pressing once.
The second press type (two-stage, known as double knock),
the first press the nib to extend the pen barrel, the second press the lead
core to extend.
Double chuck press type, adopting double chuck structure,
shorten the distance between the chuck and the tip of the pen tip, so that the
last remaining 8～15mm in the mechanical pencil has a residual lead core,
and a whole lead can be produced without pressing. Push it out by the core and
you can write.
Automatic compensation type (automatic core output) without
rotation or pulsation device, can automatically compensate the lead core,
continuous writing. The front flip can press the tip of the pen to discharge
lead.
2. Classified by style of pencil
Pencil types include: “wooden pencils”, “sharpened
pencils”,
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 consumers to sharpen the nib before it can be used. In
addition, there is a small eraser at the end of the ordinary pencil shaft. It
is more convenient to reverse the pen to erase errors. It was invented by
American painter Aman.
“Sharpened pencil” is a kind of pencil product that is
sold by processing a pencil shaft with a certain length of nib. “Pencil
with cap”
is a combination of a pencil shaft and a pencil cap.
3. According to the raw materials, it can be divided into
graphite pencils, color pencils and special pencils
According to the hardness of the pencil lead, generally “H” means
a hard pencil, “B” means a soft pencil, “HB” means
a pencil with moderate hardness, and “F” means a pencil with a
hardness between HB and H.
Arrangement (from soft to hard) 9B, 8B, 7B, 6B, 5B, 4B, 3B,
2B, B, HB, F, H, 2H, 3H, 4H, 5H, 6H, 7H, 8H, 9H, 10H, etc. Hardness level.
The larger the number in front of H, the harder the lead and
the lighter the color. The larger the number in front of B, the softer the lead
and the darker the color. The classification of pencil shafts is based on the
amount of graphite in the pen core.
Among them, H type pencils have relatively high pen core
hardness, which is suitable for objects with relatively hard or clear
interfaces, such as woodworking markings, field drawings, etc.; HB type pencils
have moderate hardness, which is suitable for general writing or writing.
Contour
Class B pencils have relatively soft refills, which are
suitable for painting and can also be used to fill in some machine-recognizable
cards. For example, we often use 2B pencils to fill in answer sheets. In
addition, there is a common color pencil shaft, which is commonly referred to
as a colored pencil, which is mainly used for drawing.
2) Color pencils
Lead colored
pencils. The lead core is composed of clay, pigment, talc, adhesive,
grease, and wax. Used for marking symbols, drawing, drawing charts and maps,
etc. Color pencils are usually packed in sets (6, 12, 24, 36, 64 colors).
3) Special pencils
Including glass pencils, color changing pencils, charcoal
pencils, drawing pencils, watercolor pencils, pastel pencils, etc., each has
its own special purpose.
Glass pencils are used in industries, medicine, national
defense, surveying and other sectors. They play a major role in writing or
marking on surfaces such as glass, metal, enamel, ceramics, leather, plastic,
and plexiglass.
Color changing pencils are known as copy pencils. The
handwriting cannot be erased with an eraser, which is suitable for writing
important documents stored for a long time and recording accounts.
The drawing pencil is also called the tracing pencil. There
will be a shading effect, used to directly display the drawing
Extended information:
Use attention
The pencil lead is not poisonous. the main raw materials for
making pencil lead are graphite and clay, so pencil lead is 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. There is nothing in the human
body that can break the carbon-carbon chemical bond, so it is safe to say that
the pencil lead is safe. The appearance of the pencil shaft is wrapped with a
film or the use of pencil lacquer technology. On the one hand, it can protect
the pencil shaft, and on the other hand, it can increase the beauty.
Manufacturing process
Taking wooden pencils as an example, they are roughly
divided into four steps: lead, pencil slat, pencil shaft and exterior
decoration.
1) The manufacture of pencil lead
A. Graphite lead core: firstly, the lead core material,
which is mixed and ground and dispersed by clay, graphite, etc., is transformed
from a loose sheet into a round lead core through a mold under the action of
external force, which is called pressing core; Drying, commonly known as drying
core; then roasting and oil immersion of the lead core.
B. Manufacturing of color lead core: There are two methods.
One is the immersion method, which divides the production of lead cores into
two stages. , clay, talc, pigments and adhesives are mixed and pressed into
lead cores; then the dried lead cores are placed in an oil immersion pot. Under
a certain temperature, the lead core can absorb grease to form a colored lead
core. Russia, Germany, Pakistan, and other countries adopt this method. The
other is the mixing method, which is to mix clay, talcum powder, pigments, and
grease, press the core, and dry to make the color lead core. China and Japan
use this method for production.
2) The production of pencil slat
The log should be untied, cut, dried, dyed, and degenerated.
3) The production of pencil shaft
Go through the process of planing groove, rubber core, glue
slat bundle clamping and drying, grinding head, and planing rod.
4) Appearance decoration
The exterior decoration of the pencil must be painted and
printed, cut, printed logo, rubberized tip, sharpened pencil tip, sticky tip,
etc.
Note: This is republished from www.durzerdpencil.com about the pencil
types. See the original post and comment thread by clicking here.
