What is the weight of an A4 sheet of paper?

One piece of A4 paper.

The weight is 70 16 grams, 80 16 grams, 90 16 grams. It is indicated on the packaging.

First of all, you need to know how many grams the quality standard of your paper is, say 70 grams or 80 grams, which are indicated on the packaging. The 70 grams or 80 grams refer to the weight of the whole paper, and the A4 paper is one-sixteenth of the whole paper (16 carats).

A4 specification: 21 * cm B4 specification: 25 *, B5 specification:

There are also according to the thickness of the paper, such as 60g, 70g, 75g, 85g, 120g, etc., which refers to the weight of the paper per unit area, because the density of the paper is basically the same, the heavier the weight of the paper per unit area, the thicker the thickness of the paper. For example, the general speed printer uses about 40g of paper, and the all-in-one machine uses 50-60g of paper, and the photocopier uses 70-85g of paper, and the printer generally does not use less than 60g thick paper, otherwise it is easy to jam.

70 grams of A4: 70 grams is 70 grams per square meter of paper, the specification of a piece of A4 paper is 210 297 (mm), and the area of a sheet is square meters The weight is: grams.

80 grams of A4: 80 grams is 80 grams per square meter of paper, the specification of a piece of A4 paper is 210 297 (mm), and the area of a sheet is square meters The weight is: grams.

The quality of a pack of 70ga4 copy paper (500 sheets) is:

Let's take the most common Kelip copy paper as an example, the specifications are:

Area A4: 210mm*297mm=

Density: 70g

Quality: Sheets = plus outer packaging, about one carton.

Why

A4 paper size origin.

A4 paper is the origin of 210mm 297mm.

Reason 1: A rectangle with a length of 2 and a width of x, after being folded in half, the length and width are x and 1 respectively, so in order to ensure similarity, 1:x=x:2 is required.

And this ratio is similar to the original paper type when a piece of paper is folded in half. If it weren't for such a ratio, such as 4:3, then we would find that when folded in half, the shape of the paper was distorted and became 3:

2 up. Reason 2:

In fact, to meet this ratio, there can be other values, such as 282mm 200mm, or other sizes.

The question is how much a pack of A4 paper weighs, and I personally think it is about 1 kilogram. That is, two catties.

Paper is a relatively heavy thing, so a pack of paper personally thinks that there should be more than two pounds of weight health knowledge.

1. It is not good to wash feet with cold water, 2. It is good to eat more bitter taste in summer;

3. Drinking more water can prevent kidney stones;

4. It is not advisable to sleep topless in summer;

5. Eat more hot porridge in winter;

6. The number of baths in winter should not be too much;

7. It is not advisable to stay in a warm room for a long time in winter;

8. It is not advisable to stay in the winter fog for a long time;

9. It is not advisable to use scarves as masks in winter;

10. It is not advisable to wash your hair in the morning in winter;

11. It is very important to warm up before fitness;

12. Sports injuries should"Cold"Dispose;

13. Walking moderately can make the brain younger;

14. Walking is most beneficial to the health of middle-aged and elderly people;

15. Deep breathing is not conducive to the health of the elderly;

16. The elderly should eat first in the morning exercise;

17. Drink a glass of milk after exercise;

18. Adequate sleep is good for health;

19. Poor mood can lead to stomach problems;

20. Mobile phone film will hurt the eyes;

21. Employees should not eat lunch in the office and walk around at noon;

22. Napping helps prevent coronary heart disease;

23. It is not advisable to decoction traditional Chinese medicine with boiling water;

24. Sugar should not be added to traditional Chinese medicine;

25. It cannot be disinfected with 95% alcohol;

26. Only after three hours of sunshine a day can it be considered a healthy residence;

27. The radiation of damaged tiles is large;

28. Leaving a gap in the bedroom window is helpful for sleeping;

29. It is not advisable to open the window for ventilation in the early morning;

30. Hot water bottles are more healthy than electric blankets;

31. It is not advisable to use plastic bags to store fruits and vegetables;

32. Chopsticks should be changed once every six months;

33. Replace the toothbrush as soon as possible if the gums are bleeding;

34. Proper brushing is more important than choosing toothpaste;

35. It is not advisable to fold the quilt immediately when you get up;

36. You can't pat the quilt when you dry it;

37. It is not advisable to drink honey on an empty stomach;

38. Drinking honey can relieve hangover;

39. Traditional Chinese medicine pays attention to drinking salt water in the morning and drinking honey in the evening;

40. Vegetarianism is more suitable for Chinese;

41. Kelp can prevent high blood pressure;

42. There are many benefits of washing your face with cold water;

43. Use warm water for brushing teeth;

44. Hot water should be used for foot washing;

45. Cold feet are easy to catch colds;

46. Dry chewing food can prevent brain aging;

47. Basking in the sun in the morning is conducive to winter health;

48. Cocking Erlang's legs will affect health;

49. Wearing a hat should not be too tight;

The copy paper is generally 500 packs, there are 5 packs, 8 packs and 10 packs, the weight of a pack of A4 70g 500 packs of copy paper is about 11 kg, the weight of 8 packs is kg, and the weight of 10 packs is 22 kg.

Further reading: 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 paper sizes.

A4 paper for other uses.

1. Instead of a ruler. Ordinary A4 to the size: 210 297 mm that is, 21 cm, remember this size, in the case of forgetting to bring a ruler, you can use it instead of a ruler, you can get a lot of dimensions by folding horizontally and vertically, etc., these dimensions.

The dimensions of objects can be accurately measured over a wide range.

2. Instead of a knife. Cut something simple and easy, there is no knife at hand, you can use a piece of paper as a knife, the edge of a single sheet of paper is very sharp, under rapid twitching, you can replace a knife, the disadvantage is that it is softer. To increase the hardness, can.

In order to fold the paper in half, although the sharpness is reduced, the hardness has increased a lot, which is enough to be used as a knife. (Note that even though it's paper, you can get your hands cut if you're not careful.)

3. Replace cups. When you go out, you don't have a paper cup, you can roll the paper into a bucket, fold it at one end, and make a simple small paper cup, which is simple and practical, and you can write after drinking and drying.

4. As for other familiar roles such as stacking hands, we omit here.

70g, 80g refers to the weight per square meter, and the size of A4 is 210mm 297mm = square meter.

The weight of each 70g 80g A4 paper is grams.

A pack of 500 sheets is 2183g 2495g ......

Plus the weight of the package......

Approximately respectively.

A4 paper length cm width: 21 cm.

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 paper sizes.

A4 paper is the origin of 210mm 297mm.

Reason 1: A rectangle with a length of 2 and a width of x, after being folded in half, the length and width are x and 1 respectively, so in order to ensure similarity, 1:x=x:2 is required.

The resulting ratio is: However, dividing 297 by 210 gives a ratio that is close to the root number two, and this ratio is similar to the original paper type when folded in half. If it's not such a ratio, say 4:

3, you will find that after folding in half, the shape of the paper is distorted and becomes 3:2.

Reason 2: The value of 210mm 297mm is related to the 4 of A4, because the size of A0 paper is 841mm 1189mm, A4 paper is the size of A0 paper folded 4 times. So the size of A4 paper is 210mm 297mm.

Standard paper is 2480 grams, in fact, we say 80 grams refers to 80 grams of square meters, A4 paper of course there is no 80 grams, a pack of standard copy paper is 500 sheets of international packaging, the weight of which I measured with an electronic scale of 2480 grams, of course, the quality of each brand is different, roughly such a standard, but also please consider that there are some not very honest merchants on the market only do 400 or other quantities.

The quality is different, and the weight is different.

Because the weight of the paper is different depending on the material. The most common paper in the market is mostly 70 grams of paper, which means that the weight of paper per square meter is 70 grams. Taking 70 grams of paper as an example, the size of a piece of A4 paper is 210 millimeters multiplied by 297 millimeters, and the area is square meters, so its weight is grams.

The general process starts from discovering the problem and raising the problem, and after discovering the problem, make assumptions about the answer to the problem according to their existing knowledge and life experience Design the first plan, including the selection of materials, design methods and steps, etc. After reaching a conclusion, it is also necessary to reflect on the whole process of the general methodological steps of the experiment: asking questions, making hypotheses, making plans, implementing plans, drawing conclusions, expressing and communicating

Observation is a basic method of science Scientific observation can be made directly with the naked eye, with the help of magnifying glasses, microscopes and other instruments, or with the use of cameras, video recorders, video cameras and other tools, and sometimes it is necessary to measure Scientific observation should have a clear purpose; Observations should be comprehensive, meticulous, and realistic, and recorded in a timely manner; Be planned and patient; Think positively and record in a timely manner; To exchange views and discuss The design of the experimental protocol should be carried out closely around the questions and hypotheses raised When studying the influence of one condition on the research object, the experiment carried out under the same conditions except for the different conditions is called a controlled experiment General steps: find and ask questions; gather information related to the issue; make assumptions; design of experimental protocols; Conduct experiments and record them; analysis of experimental phenomena; Conclusion Investigation is one of the common methods of science When investigating, we must first clarify the purpose of the investigation and the object of the investigation, and formulate a reasonable investigation plan During the investigation process, sometimes because the scope of the investigation is very large, it is necessary to select a part of the survey objects as samples During the investigation process, it is necessary to record truthfully The results of the investigation should be sorted out and analyzed, and sometimes the statistical methods should be used to collect and analyze data is also one of the common methods of science There are many ways to collect information Go to the library to consult books and newspapers, and visit relevant people, The form of information includes text, **, data, and audio-visual data, etc., and the information obtained should be sorted out and analyzed, and answers should be found from it.

The specifications of various types of paper are different, so the weight is also different.

Take 70 grams of A4 paper as an example:

70 grams means that there are 70 grams per square meter of paper.

The size of a sheet of A4 paper is 210*297

The area of one sheet is square meters.

The weight is: grams.

Weigh 100 sheets and divide by 100

Generally there are 70 grams.

Based on the fact that the A4 paper size is 210 mm and 297 mm, and 1 inch = centimeter, we can get how many millimeters the A4 paper size is when the resolution is how many pixels.

Method: A0 paper length is folded in half to become A1 paper; A1 paper length direction folded in half to become A2 paper; The length of A2 paper becomes A3 paper when folded in half, and the length of A3 paper becomes A4 paper when folded in half.

Precautions for the use of A4 paper.

You can write, you can wipe your mouth, you can print, you can draw, you can fold an airplane, you can fold a box, you can throw it away when you vent, you can wrap things, you can put on the bottom of a table and a chair, you can use it as a bookmark, you can plug the cracks of the door, you can use it as a fire primer.

Due to the different number of layers of multi-layer computer paper, the total thickness of several layers of paper is also different, and the strength adjustment rod should be selected to match the gear when printing, so as to avoid the printing head being too close or too far away from the paper, resulting in unclear color or jamming. The specific scale is marked on the machine, remember to turn off the printer and open the dust cover before adjustment.

A standard oneA4 paperThere are: gram zhang and gram zhang. The aspect ratio of Group A paper sizes is 2:1 and then rounded to the nearest millimeter.

A0 is defined as paper with an area of one square meter and a 2:1 aspect ratio. Next A1, A2, A3 ......For other paper sizes, it is defined as folding the paper with one less number along the long side and rounding it off to the nearest millimeter.

The size of the B paper is the geometric average of the paper in Group A with the same number and one less number.

Before the popularization of printers, B-group paper was often used. Group C paper ruler medium width reed inch is mainly used for envelopes.

Other formats:

Before ISO 216 was widely adopted, there were many different paper formats internationally. These formats are not a coherent system, and many are not defined in metric units. The format of ISO 216 follows 1:

2 ratios; The two sheets of paper together have the same aspect ratio and sides.

This feature simplifies a lot of things, such as: shrinking two sheets of A4 paper into one A4 sheet; Enlarge and photocopy a piece of A4 paper to a piece of A3 paper to sell tape sheets; Photocopy and enlarge half of A4 paper to one A4 sheet of paper, and so on.

The main obstacle to this standard is the United States and Canada, which still use the letter, legal, executive paper size systems. (Canada uses a P paper size, but it's actually the U.S. paper size, and then take the closest metric size.) ）

The above content refers to Encyclopedia—A4 paper.