Astrobatigue, more common office learning tools in life.The main ingredient is rubber, which is used to wipe the traces of the pencil drawn.There are many types of rubber rubbing today to meet different needs.So why can rubbers remove traces and what are its types?Lets take a look with Xiaobian below!
Principles of rubber rubbing work
The rubber rubbing is made of PVC, but the plasticizer ATBC is added.That is, using physical principles (non -magic pens), the handwriting (not only a pencil word) is peeled away from the material on the surface of the object (excluded the modification band and the modified solution).
When rubbing the handwriting with a rubber pencil, it is actually the handwriting of the rubber written on the paper (composed of a pencil powder).As long as the rubber is wiped, the pencil handwriting of the "footprint" of the rubber disappears, that is, the adsorption force of the rubber on the pencil powder is greater than the adsorption force of the paper on the pencil powder.When writing with a pen, if you want to wipe off the surface of the paper and the internal deeper paper (enter the ink in the paper), you must be equipped with a hard fine powder in the rubber.The working principle of this rubber is like a stingy with a knife, but the traces of rubbing the pencil with a rubber are the phenomenon of friction.
Types of rubber rubbing
There are many types of rubber rubbing today to meet different needs.
1. There is a small rubber rubbing at the tail of some pencils.These rubber rubbing is mostly pink, and the surface is smooth glue.They have good performance on most occasions, but if they are too heavy, the rubber rubbing will break the paper.When the handwriting is wiped off, the rubber rubbing will leave the residue on the paper.If the cleaning is not good, these residues will leave traces on the paper.
2. Another kind of rubber rubbing is a brown rubber rubbing commonly used by artists, which is made of soft and rough rubber.Its design is convenient for removing traces of large areas and will not break the paper.But this rubber rubbing cannot be effectively and accurately erased.
3. There is also a rubber rubbing commonly used by artists called soft rubber.It is mainly caused by a gray material, and it is like gum rubber.Its strength makes it not leave residues, so its life span is longer than other erasure.It removes the handwriting by absorbing graphite.This rubber can not only rub the handwriting (in fact it can accurately remove the handwriting), it can also be used as a highlighting part or making the work more detailed.However, it is not good at removing a large area of ??handwriting, and it will just stain or stick paper if it is overly heated.
4. The soft polyethylene rubber rubbing has the texture of plastic, and has the same function as ordinary pink rubber rubbing.These rubber rubbing is soft than pink rubber, so it is not easy to damage paper.Polyethylene rubber rubbing is generally white.
5. Rubbing used by general students with fragrance.This fragrance is a volatile oil. If plastic and rubber have been placed together for a long time, the oil (organic solvent) volatilized by rubber can dissolve plastic in small amounts, which causes the rubber rubbing and corrosion we see in our seeThe stationery is above.
Due to the softness and structure of rubber rubbing.In home life, you can use rubber to remove some of the stains.For example, the cleaning of a computer memory can be wiped with dry and soft rubber.Wipe a piece of rubber on the phones case a few times, so that the dirt on the mobile phone case is easy to remove.
Precautions for rubber rubbing
Brown, pink, black are used for graphic rubber for 2B, 4B, etc., which are basically rubber rubber.Soft, discover opaque to strong light sources.The more common on the market is a Korean brand and Mali brand.Although it is indicated by the dedicated drawing, the comfort and erase effect are good (do not refer to the effect of erasing carbon, and it is distinguished from the naked eye). It is still favored by students.Its a little inconvenient.
Another rubber that is commonly used for sketch is plastic rubber (soft rubber). This rubber, as its name implies, can freely shape the form, and is also the softest in the rubber family.Not suitable for daily writing.This rubber has a strong plastic texture because it contains polypropylene.In the strong light source, a translucent state will be presented.When erasing, the rubber dander generally does not form a strip, and it forms a small section or a small section or close to the granular.As shown in the figure, this is a high -grade drawing rubber that clearly indicates the plastic rubber (Plasticeraser). Students who are not assured can try to buy this clearly marked rubber (but also ask the owner as much as possible to get the most secure choice).
Some "flower rubber" in the market are essentially a plastic rubber, but it is indeed a "embroidered pillow". The appearance is good -looking, but it is really not recommended. It is not recommended, especially answering.