2024 Author: Priscilla Miln | [email protected]. Last modified: 2023-12-16 00:21
The density of whatman paper or printing paper is very important. This criterion determines their scope, print quality and even the durability of the printer. What is the density of different types of paper, and how to choose the right one for a particular type of work?
Density and thickness are not the same thing
Speaking of density, many people mean the thickness of the paper, but this is wrong. A thicker sheet of one brand of paper seems to be thicker than another, while their weights may be identical.
Actually, thicker paper is looser and more porous, wears out more quickly, and has a shorter lifespan. Whereas thin with a higher density is more compressed and will last longer. And the ink lays on it more evenly, which is the key to clear, high-quality printing. Therefore, thin paper may not always be bad.
Which paper is used where?
In different areas, paper of different density is used. For example, printing requires indicators from 60 to 300 g/m2. This figure is much less for newsprint - only 45-60 g/m2. Drawing paper or watercolor paper, paper for letters and business cards - all these are certain varieties with a specific density, the criteria for which are strictly regulated. And whatman paper even has clear indicators recorded in GOST.
Speaking of whatman paper, it is worth noting that this is the largest paper format used in the field of design and art. It is very popular among people of various professions.
Print density and quality
Paper weight and printer specifications are closely related. In the instructions for each printer, the manufacturer usually indicates the format and recommended density. Marking A4, 64-163 g/m2, for example, means that this particular paper is suitable for this device. Whatman paper with a density higher than the permissible one will not work - it can even damage the mechanism and disable the printer.
As a rule, standard office printers and copiers use A3 and A4 paper, with an average weight of 80 g/m2. It is these indicators that manufacturers are guided by when releasing paper for printing. Each of them produces its own brand, with a guarantee of high quality printing on paper of this brand. For example, products of the domestic brand Snegurochka are very popular in our offices.
Paper weight and GOST indicators
If the density is known, then the weight of a sheet of paper is also easy to determine. For example, an A4 sheet with numbers on an 80 g/m package2 will weigh almost 5 grams. In a standard ream of such paper500 sheets, which means that the weight of the pack will be about 2.5 kilograms. If the actual weight exceeds this figure, most likely the storage conditions were not observed, and the moisture level of the paper is above the norm.
Paper for office printing, books and forms, with a density of 160 g/m² will have rates from 800 to 900 kg per cubic meter. Less than 160 - from 750 to 850 kg / m³ In addition to offset paper, whatman paper is also popular. GOST sets the density for it at the level of 850–950 kg / m³. Newsprint paper has the lowest density - it is also the most inexpensive. The term of its "life" is only a few days, after which the manufacturer cannot guarantee wear resistance: such paper begins to crumble and turn yellow.
Depending on printing tasks, paper weight, stiffness, and thickness may vary. To date, there are different standards, and it will not be difficult to select all the criteria individually.
Whatman - premium paper
The density of Whatman paper is higher than other types of paper, so it is considered a first-class product. There are several standard formats: from A1 to A4 (you can also find A5 format paper), each of them has its own density - ranging from 120 to 200 g / m². And there is also A0 paper with impressive sheet dimensions of 841x1189 cm. This Whatman paper will be larger in size than all other formats combined.
In addition to such indicators as the weight and density of whatman paper, the uniformity of the paper mass is also important, which improves the quality of printing. And the high opacity of the sheet allowsprint or draw on both sides of it.
How to determine that you have a real high-quality drawing paper? First of all, in appearance: this paper is white, dense and smooth. If in doubt, put some clean water on the leaf. From it drawing paper should not be deformed. It is this one that is used not only for drawing, but also for drawing - with paints, ink or pencil. Although for this purpose, professional artists often buy special watercolor paper, with high density and excellent moisture absorption.
Where and how much to buy paper?
So, you know what tasks you need this paper for, you know what the density of whatman paper should be, but where to buy it? Usually in a stationery store or bookstore. Whatman paper is sold at an affordable price - you will need to pay no more than 20 rubles for an A1 sheet. Smaller sheets will cost you even less.
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