Paper or roll paper, which one do you use to wipe your mouth?

Some people say, "Roll paper is used to go to the toilet. It cannot be used to wipe your mouth. Do you need to use paper to wipe your mouth." Is this kind of saying right? Will you distinguish the use of rolls and pumping paper in daily life? What are the differences between them? Let's take a look together-

On the surface, roll paper and paper pump are only different forms of paper. However, as industrial products, roll paper and paper drawing are produced strictly in accordance with relevant standards, so if you want to understand their differences in depth, you need to check the production standards behind.

The general basis for roll paper on the market is GB/T 20810-2018 "Toilet Paper (including the original paper)" (hereinafter referred to as the "roll paper standard"), and most of the standards based on the paper drawing paper are GB/T 20808-2022 "Paper Towel" (Barrier referred to as "Paper Standards").

Everyone may not be familiar with the standard name, here is a brief introduction:

The "GB" in the standard is the first letter of Pinyin, which means "national standard"; "T" is the first letter of Pinyin, which means "recommendation"; "20810" and "20808" are The order number of the standard; the final "2018" and "2022" are standard releases, and the standards are generally updated from time to time.

Everyone reads it wrong. Both of these standards are recommended national standards and are not mandatory.

However, state -owned and national laws have rules and rules. For many considerations such as approval and sales, manufacturers generally follow these standards, and they will also indicate the final products.

Standard instructions on rolling paper (left) and pumping paper (right) products.

1

Different design purposes

Maybe some are unexpected. In fact, the roll paper standard clearly states that the applicable object is toilet toilet paper. It also stipulates that the packaging of this paper should be marked with the word "toilet", as shown in the figure below.

However, because the labeling is too small, many people may not pay attention.

"Toilet" instructions on roll paper products.

In contrast, the first chapter of the standard of pumping paper states that the applicable object is napkin paper and handkerchief paper.

It can also be seen from these expressions that the original intention of roll paper was designed for toilet, and pumping paper was the role of "one heart" to play a napkin paper.

2

Different materials for papermaking

When it comes to papermaking techniques, everyone must be familiar to everyone. It is one of the four major inventions of our country. During the Eastern Han Dynasty, Cai Lun improved papermaking and made paper with raw materials such as bark.

In fact, to this day, the commonly used papermaking raw materials (pulp) are not much different from the ancients. The classification is shown in the figure below. Use the fiber in the pulp to create a strong and tough paper.

Passal classification.

It is generally believed that the quality of native wood pulp is the best, the native non -wood pulp is second, and the quality of the return pulp is the worst. Roll paper standard allows using primary pulp or reuse pulp. The original pulp roll paper can be divided into superior products, first -class products and qualified products (the best products, the most qualified products); while the standard of pumping the paper must be Native pulp, ordinary types can be divided into excellent products and qualified products.

However, you do n’t have to worry too much about it. In actual products, the raw materials of most brands of paper paper are indicated as “100%native wood pulp”, and the quality should be guaranteed. In addition, some merchants have recently promoted pure wood pulp. Here we need to remind everyone that pure wood pulp and native wood pulp are different. Native wood pulp comes from natural wood, and pure wood pulp may include recycled second -hand wood pulp.

Jacket paper and pumping product pulp and quality description.

3

Microbial requirements are different

In terms of production standards, the total number of bacterial bacteria of roll paper must not exceed 600cfu/g, and paper pump must not exceed 200cfu/g. The CFU is the "colonial formation unit", and "600" and "200" can be understood as the number of colonies on the dine.

If the density of the paper is calculated at 0.5g/cm³, for a roll of paper, if the length is 16cm, the width is 12cm, and the thickness is 0.025cm, the weight is 16 × 12 × 0.025 × 0.5 = 2.4g. More than 1440cfu; for a piece of paper, assuming a piece of length of 20cm, a width of 16cm, and a thickness of 0.025cm, the weight is 20 × 16 × 0.025 × 0.5 = 4g, and the total number of bacterial colonies does not exceed 800CFU.

Considering that the area of ​​a single -section roll paper is generally smaller than a single piece of paper, and the amount of roll paper is often more. Therefore, the difference in the number of bacteria in the actual life will be greater. Of course, the size and thickness of different paper are different. This estimation is for reference only, and the specific test shall prevail.

Comparison of roll paper and pumping paper.

From the perspective of quantity, drawing paper is indeed more hygienic, but how much is hygienic, maybe everyone lacks a specific concept. We use the hands and mobile phones that everyone is very familiar with as an example. In 2015, the Chengdu Third People's Hospital walked into the office building to carry out bacterial testing public welfare projects on the "Global Washing Day". It was found that the total number of bacteria colonies before washing hands in the workplace could reach 500CFU.

If the roll paper and the pumping paper just meet the standard, the gap between the number of bacteria for a piece of roll paper and a piece of paper is probably equivalent to the number of bacteria on one hand.

It is worth mentioning that hands washing can effectively reduce the number of bacteria on the hands.

Remind everyone: The screen of the mobile phone is also the hardest hit area for dirty dirt. It is recommended to clean the phone regularly. It is best to put down the phone when dining.

4

Different technical indicators

There are many different technical indicators of roll paper and paper pumping. Among them, the more attention is migrant fluorescent substances, heavy metal content, and longitudinal wet resistance. "Migration" means that the material can be transferred to the skin or mucous membrane by touching it; "fluorescent substances" mainly refer to the fluorescent whitening agent used by manufacturers to make the paper towel look whiter. It is a complex organic compound. After entering the body, it may cause harm.

The surface of the human skin has a keratin, which can hinder the skin absorption of macromolecular organic matter such as fluorescent whitening agents. However, when we wipe our mouths with paper towels, if there is a migrant fluorescent whitening agent in the paper, it may enter the mouth to cause causing it Hidden health hazards.

In the production standards, the rolls of paper pumping and the use of primary pulp have clearly required not to detect migrant fluorescent substances on the paper surface, but there are no requirements for roll paper using the replacement pulp, and there are hidden safety hazards.

In terms of heavy metal content, there are many types of elements of paper testing than paper rolls, and the standards are stricter.

Due to the needs, the paper towels are required to have a high longitudinal wet resistance. After the water is used, it is still relatively tough, and it will not dip the paper scraps everywhere, which is convenient to wipe the mouth and the table. Low longitudinal dampness resistance, the water is quickly dispersed after the toilet is used to avoid blocking the sewer.

We can do a simple experiment to confirm it. As shown in the figure, put a roll paper and a piece of paper into the same water cup. After the same time is stirred, the roll paper is torn and scattered. It was turbid; the pumping paper remained complete, and the water in the cup was relatively clear.

Concerning experimental results: rolled paper on the left, and the right side of the paper.

Back to the initial question: Can roll paper be used to wipe your mouth? In fact, through the previous analysis, we can see that the various indicators of roll paper are designed around the toilet. If the conditions are allowed, it is recommended to specially paper, the napkins are pumped, and the toilet paper is used for roll paper.

Of course, because the quality of most brands of roll paper is better. If there is no pumping paper on the body, it is urgent to obey the power, and there is no problem with the quality of roll paper as a tissue paper temporarily. However, if it is a rolling paper with unknown quality, it is recommended to be careful not to wipe your mouth.

Finally, you need to remind everyone that whether it is rolling paper or pumping paper, there is a shelf life, generally 3 years, and it is also indicated in the packaging. After the shelf life, the number of microorganisms of paper may exceed the scope of application, and the strength and toughness are no longer guaranteed. At this time, it is not recommended to continue using these paper, at least not to wipe the skin (can be used to clean the tables, cabinets, etc. ), To protect our health.

Source: Science Popularization China (Author: Xiao Yidong University of the Chinese Academy of Sciences, Zhang Yi of Southeast University), Xinhuanet, etc.

Responsible editor: Fang Shujing Su Haojun Chen Zhaoyue

Edit: Zhang Xiaojing

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