The whiteness of the copy paper is not as high as possible, but where is it high or low? 5

When the waterfall crosses a steep wall, it looks particularly majestic.

The road through the clouds, kissing only the footprints of the climber.

At present, the relevant state departments have commissioned the China Pulp and Paper Research Institute to draft a standard for the whiteness of paper products, which will stipulate the maximum limit for the whiteness (brightness) of paper and cardboard, and all products that exceed the limit are unqualified. "The whiteness of an ordinary printer paper is about 100%, but in terms of eye comfort, a whiteness of about 85% is enough. Jiang Rongqi, executive secretary general of the Shanghai Paper Society, said that many consumers have deviations in the concept of consumption, thinking that the whiter the paper, the better, but in fact, manufacturers in order to increase the whiteness of the paper to add fluorescent bleach, which not only wastes resources but also causes pollution, and at the same time, the whiteness of the paper is too high will also cause harm to people's vision.

However, the recycled paper with low whiteness is difficult to promote because of the wrong consumption concept of consumers.

Copy paper. It's all made of bad pulp.

So photocopying paper dishes is cheap.

For example, the newspaper of **.

Weeds. are used to make the pulp of copy paper.

But this kind of paper is too bad.

The paper that comes out may be black. Therefore, fluorescent brighteners are added to the pulp during production. The more brighteners, the whiter the paper.

Of course. The harm to the human body will also be greater!

90 degrees is okay.

In terms of metaplasia, the whiter it is, the more bleach he puts in, and everyone knows that some bleach is poisonous.

It's good that it doesn't look dazzling, and it's good that you can see it when you copy it!

The paper is too white and it looks like it hurts your eyes!

1. The selection of partners is the usual choice for large enterprises to purchase copy paper for office supplies.

Office supplies such as copy paper are basically disposable, and they cannot be reused after they are used. The demand for copy paper in the company's office is very large, and it is usually used up this month and will continue to purchase it next month. Therefore, choosing a suitable partner for long-term procurement cooperation can not only save a lot of procurement costs, but also save a lot of time to discuss issues such as delivery.

Here it is recommended that you choose a regular office supplies dealer like Baixin Office Supplies** as a partner, and after-sales service will be greatly guaranteed.

2. Detect the quality of the copy paper by looking at it with your eyes and touching it with your hands.

The most straightforward way to identify the quality of a copy paper is to look at it with your eyes. Of course, it's also knowledgeable, how to see it? What to see?

These are all issues that need attention. First of all, of course, it is to observe whether there are stains on the paper, such as small black spots, grass yellow patches or other foreign bodies, if you are not talking about the copy paper under the light, observe whether the light transmission of the copy paper is uniform, if it is not uniform, the production process of the copy paper is very poor, and the distribution of raw materials is uneven, it is recommended not to buy. Secondly, touch the copy paper with your hand to feel how it feels, whether the feel is smooth, and whether there is a rough feeling of pricking your hands?

Do you feel bumpy? Do you feel like the threads are cracked? If there is a suggestion, do not buy.

3. Use a photocopier to test the copying effect of the copy paper.

This is the most direct way to detect the copying effect of the copy paper, through the copy test of the sample copy paper to observe whether the copy paper is jammed? Is the copy clear? If it's not clear, it's a printer problem or a copy paper quality issue. These should be studied and carefully considered!

Factors affecting the whiteness of the paper:

1. Whiteness of fiber slurry;

2. Sizing agent (ADK neutral sizing agent and acid sizing);

3. Effect of filler on paper whiteness (common fillers: clay, talcum powder, calcium carbonate);

4. Fluorescent brightener;

5. Toning;