How to distinguish the front and back of the paper How to better distinguish the front and back of t

There are both sides to the paper. For example, single-sided offset paper.

and single-sided coated paper.

Posters, etc., are divided into positive and negative when choosing paper, and it is easier to distinguish them. What about general non-single-sided paper? The simple way is to fold the corner of the paper and compare the two sides, and you can see that the front side is more reflective, and the back side is weaker or not reflective.

Or gently touch both sides of the paper with your fingers, the smooth feel is the front, and the rough feel is the back. Some high-grade papers are super calendered, and the smoothness of the front and back is so close that it is impossible to distinguish by hand feel or reflection. The drying method can be used.

That is, the paper sample is placed in the oven to dry, and after the moisture in the paper is completely steamed, the paper strip will be rolled up, and the reverse side of the paper will be rolled inward; The outward-facing side is the front of the paper. You can also expose the paper strip to strong sunlight, and after the paper is dried, the paper will also curl, and the front and back will be the same as those handled in the oven. Why isn't there a paper with the exact same front and back?

This is related to the papermaking method. It is impossible to copy out the long-screen or rotary screen paper machines currently used. Even if it is double-sided coated paper and double-sided coated paper, the smoothness and smoothness of the front side are still higher than those on the reverse side.

The front and back sides of the paper can be distinguished by:

1.Intuitive method: Observe the crease of the paper, if the crease is more prominent, then it is the reverse side.

2.Wetting method: impregnate the paper with water or dilute radon sodium oxide solution and observe both sides, if there is a clear screen print, then it is the reverse side.

3.Tearing method: Hold the test piece in one hand, so that the longitudinal is parallel to the line of sight, and the surface of the test piece is horizontal, and pull the paper up with the other hand, so that it is torn longitudinally first.

Then gradually turn the direction of the tearing paper horizontally, and tear it towards the outside of the paper. Turn over the paper surface, so that the other side is up, still tear the paper according to the method, compare the paper wool on the two tearing lines, one line is more obvious than the other, especially the longitudinal, turning, transverse curve, the paper hair is obvious for the mesh, when the mesh is facing up, the raw edge of the paper is even more.

It should be noted that some papers may not be easy to distinguish between the front and back by the above methods after processing.

Paper. There are pros and cons.

1. You can distinguish ordinary printing paper from both sides of the paper, and the glossy side is the printing surface.

If you're using a laser printer.

Then there is nothing wrong with printing on either side of ordinary printer paper.

If you use an inkjet printer.

Simple text printing should be fine, but when you print**, the front side will print better than the back side. Reflected in the edge of the ** and the color demarcation position on the reverse side will be very ambiguous.

2. If you use professional printing paper or photo paper.

Hit the mark of the breeder. a. Professional printing paper (such as epson), you can clearly see that there is a clear difference between the front and the back, our printing surface is on the front, that is, the glossy side.

b. If it is photo paper, you can see which side is the front side from the color of the two sides.

In short, it depends on your printing requirements. If it's text and the requirements are not high, you'd better use laser printing, because inkjet printing with ordinary paper is more ink-intensive. Moreover, if you use an inkjet printer, it is best not to use ordinary printing paper, because its paper surface will have many times more paper scraps than professional printing paper, which is easy to cause the inkjet printer print head to clog.

Generally speaking, the paper is collapsed back to have the front and back, when choosing the paper, turn over a corner, and then compare the two sides into the first row, it is easy to find that the front reflectivity is stronger, and it is smoother to touch it by hand, and the flip reflectivity is weak or non-reflective, and the feel is rougher to the touch. However, some high-grade papers have a similar smoothness on the front and back, and they need to be distinguished by special methods.

Whether the paper has a front and back.

Ordinary printing paper also has a front and back, usually the smooth side is the printing surface, and its printing effect is better than the reverse side, and it looks clearer. However, not all paper is judged by the rough side of the glossy surface, the rough side of the sketch paper is the front side, and the reverse side is smoother, because the rough surface can absorb toner and lead powder, and the painting effect is better.

In the case of normal writing, in fact, whether it is smooth or rough, it can be written, although the actual effect has a certain difference, but it does not affect the use, so you don't need to pay special attention, but if it is in the printing, if you want to have a better effect and clearer, it is recommended to use the front.

Why does paper have a front and back

The reason why paper has a positive aspect is because the forming process of the paper is different, which makes the nature of the front and back sides different, which is also known as the two-sided nature of the paper. When making paper, the water in the slurry moves from the front of the paper to the mesh (back), and when the mesh is dehydrated, the mesh will play a role in filtration, and at this time, some of the fillers and fine fibers in the slurry will be lost due to dehydration, so the reverse side is rougher than the front.

1. Distinguish according to the pattern.

A4 printing paper is divided into T-shirt hot stamping paper and sublimation ink paper, imported paper generally has a pattern, the sticky side is the printing surface, or the whiter side, clear and normal color is the front of Liang.

2. Distinguish according to the smoothness of the paper.

The print side is on the front side, which is the glossy side. A4 printing paper can be distinguished from the two sides of the paper, and the smooth side is the printing surface. If you are using an inkjet printer, when printing, the printing effect on the front side will be better than that on the reverse side, which will be reflected in the edge and color demarcation position on the reverse side will be blurry.

Expand the balance and expand the information:

A4 paper is a kind of printing paper, and it is also the most commonly used printing paper on the market, ordinary A4 paper can be printed on the front and back, but if you use an inkjet printer, the printing paper has front and back.

A4 paper is defined by ISO 216 of the International Organization for Standardization, with a specification of 21*, and most countries in the world use this international standard for rubber sizing, which was originally incorporated into DIN (number DIN 476) by the German Empire in 1922.

Dear, I am glad to answer for you: how to confirm the front and back of household paper Answer: The paper is divided into front and back.

The side to which the copper mesh is attached is the reverse side, also known as the mesh surface, and the side that is in contact with the blanket is the front side, also known as the blanket surface. The back of the paper is reticulated, and the loss rate of fine fibers is large. Since this surface makes the surface of the paper rough and loose, the front is relatively tight.

Due to the difference between the front and back of the paper, the difference in composition on both sides of the paper makes some properties of the paper (such as smoothness, whiteness, sizing, etc.) different. This difference is called the two-sided nature of the paper. Some performance tests of paper are usually performed on both sides.

If you are testing on only one side, you must state which side you want to test against. Therefore, the front and back sides of the paper should be identified before inspection. The method of identifying the front and back of the paper is as follows.

1) Fold a specimen intuitively and observe the relative smoothness of one side. The mesh surface is often recognizable from the diamond-shaped indentations of the paper mesh. When holding it, it is placed horizontally so that the incident light is at a 45° angle to the paper surface, and the line of sight is also at a 45° angle to the paper surface, and the mesh marks on the paper surface are observed.

The paper surface can also be viewed under a microscope to help identify the mesh. (2) Before impregnating the paper with water or dilute radon oxygen slow roller solution in the wetting method, drain the excess liquid, leave it for a few minutes, observe both sides, and if there is a clear screen print, it is the reverse side. (3) Tearing method: Hold the test piece in one hand to disturb the height, so that the longitudinal is parallel to the line of sight, and the surface of the test piece is horizontal, and the paper is pulled up with the other hand, so that it is torn longitudinally first.

Then gradually turn the direction of the tearing paper horizontally, and tear it towards the outside of the paper. Turn over the paper, so that the other side is up, still tear the paper according to the above method, compare the paper wool on the two tearing lines, and the one on one line is more obvious than the other. Especially at the longitudinal, steering, and transverse curves, the paper wool is obviously mesh, and when the mesh is facing up, the paper is even more frayed.

More than one of the three identification methods can be selected. I hope mine can help you.

There is so much paper, what kind of paper are you talking about.

Packaging paper: whiteboard paper, white cardboard, kraft paper, kraft paper, corrugated paper, containerboard, tea board paper, sheepskin, chicken paper, cigarette paper, silicone oil paper, paper cup (bag) base paper, coated paper, cellophane, oil-proof, moisture-proof paper, transparent paper, aluminum foil, trademark, label paper, fruit bag paper, black cardboard, color cardboard, double gray paper, gray board paper;

Printing paper: coated paper, newsprint, lightly coated paper, light paper, offset paper, writing paper, dictionary paper, book paper, Dowling paper, beige Dowling paper, ivory white Dowling paper;

Industrial paper (mainly refers to special paper that needs to be processed into writing, packaging, etc.): release paper, carbon paper, insulating paper, filter paper, test paper, capacitor paper, pressing paper, dust-free paper, impregnated paper, sandpaper, anti-rust paper;

Office and cultural paper: tracing, drawing paper, copy paper, art paper, carbon paper, fax paper, printing paper, copy paper, photo paper, rice paper, thermal paper, color spray paper, film paper, sulfuric acid paper;

Household paper: toilet paper, facial tissues, napkins, diapers, sanitary napkins, wet wipes;

Special paper: decorative base paper, water-patterned paper, leather-grained paper, gold and silver cardboard, patterned paper, anti-counterfeiting paper.

A lot of paper is as smooth on the front and back as it can be printed, printed.

There are 3 kinds to say. Feel: Smooth on the front, rough on the back.

Luster: Good gloss on the front, dark on the back.

Texture: There is a texture on the front of the special paper, but there is no on the back.

In the afternoon of hoeing day, sweat drops into the soil.

From the pattern and smoothness to distinguish, the front is generally smooth and the color pattern is bright.

1. You can distinguish ordinary printing paper from both sides of the paper, and the glossy side is the printing surface.

If you are using a laser printer, then there is no problem with printing on either side of a regular printer paper.

If you use an inkjet printer, you should have no problem with simple text printing, but when printing**, the front side will print better than the back side. It is reflected in the edge of ** and the color demarcation position will be blurred on the reverse side.

2. If you use professional printing paper or photo paper to print.

a. Professional printing paper (such as epson), it can be clearly seen that there is a clear difference between the front and the back, and the printing surface is on the front, that is, the glossy side.

b. If it is photo paper, you can see which side is the front side from the color of the two sides.

In short, it depends on the printing requirements. If it is text and the requirements are not high, it is best to use laser printing, because ordinary paper for inkjet printing is more ink-intensive. Moreover, if you use an inkjet printer, it is best not to use ordinary printing paper, because his paper surface will have many times more paper scraps than professional printing paper, which is easy to cause the inkjet printer print head to clog.

A4 has no front and back sides, every side is the same.

The generally smooth side is the front.