When buying a floor, you must first read the inspection report. This is undoubtedly true, but how to understand the report is probably not understood by many owners. The editor randomly searched for several floor test reports on the Internet and briefly explained them.
As you can see, it is the same test report, but the full name and seal of the testing unit are different. So how to judge? Who is true and who is false?
It’s hard to say who is genuine and who is fake, because some people or companies are so powerful in counterfeiting that they can only go to the testing agency to check whether the authenticity and content match their testing number.
At present, the more authoritative ones are those prefixed with "国". The more authoritative ones with the prefix "国" are "National Quality Supervision and Inspection Center for Artificial Panels" and "National Quality Supervision and Inspection Center for Artificial Panels and Bamboo and Wooden Products" ". Someone said, which one of the two is more authoritative? In fact, these two supervision and inspection centers are the same organization, but their names were later changed. On March 17, 2008, the China National Certification and Accreditation Administration approved the request for the "National Quality Supervision and Inspection Center for Artificial Panels" to be renamed the "National Quality Supervision and Inspection Center for Artificial Panels and Wood and Bamboo Products", so 09 The names of the testing reporting agencies I saw this year have all changed.
First, let’s briefly talk about the simple method to judge the authenticity and authority of the building materials inspection report
1. Check whether the seam seal is consistent with the name of the inspection agency
2. Check if there is a "CAL", or "CMA" seal, or a "CNAS" seal, etc. These are national-level accreditation seals. Below these chapters are the accreditation numbers of national or provincial-level units. You can go to the relevant Check the authenticity of government agency websites.
3. Check whether the cover number and the inner core number of the test report are consistent.
4. Look at the issuance date of the inspection report. For example, the floor inspection report is usually inspected once a year.
Let’s take the laminate flooring with the largest sales volume as an example to explain the content analysis of the floor inspection report
A. Look at the first page first (the inspection report is obtained from an Internet search, I am not correct Responsible for its authenticity)
1. Testing number: Through this number, you can go to the relevant testing agency to check the authenticity or whether the specific content matches;
2. The entrusting unit: In fact, it is the unit Can be entrusted, whether it is a manufacturer, seller or bag company. Of course, it is usually entrusted by the production company;
3. Production unit: The floor must have a production unit! Otherwise, does it grow on the ground? Of course, you don’t have to fill it in. Some inspection units don’t want to let people Don’t fill it in even if you know the place of origin;
4. Product name: You can call it anything. The unit that submits it for inspection will name it, even if it is called "Gou Sheng";
5. Trademark: The product must have Only trademarks can be sold, which is stipulated by the national trademark law. Of course, as for whether the floor is really a product of this trademark, the testing agency is not responsible for the investigation;
6. Specifications: The industry requires that each floor size be tested one by one, and one specification cannot be tested to replace all specifications. . Specifications refer to size, not color;
7. Inspection category: Basically, all products are submitted for inspection. Countries with thousands of companies and countless sales channels cannot afford random inspections. As for whether the products sent are from our own product testing agencies, we are not responsible for the investigation;
8. Level: different levels determine different testing standards;
9. Inspection basis: Is there any law to follow? , otherwise how can we measure each other;
10. Sampling location: Since it is commissioned or submitted for inspection, it does not need to be filled in;
11. Sample arrival date: It means that the products that need to be tested arrive at the testing agency Date;
12. Number of samples: Do we need to take the average test or test different indicators;
13. Sample delivery person: There is nothing to explain;
14. Sampling base: Since it is a commission or submission for inspection, it does not need to be filled in;
15. Production date: The sample sender shall report it himself.
Summary 1: The testing agency is only responsible for the samples sent. As for whose product it is, it is not responsible for whether it is counterfeit or OEM. Therefore, the test report is for reference only.
B. Look at the second page again (the test report was obtained from an Internet search, so what was searched was the second page of another test report, and I am not responsible for its authenticity)
This page generally contains specific testing content. Not all items may be tested. First, some items are not suitable for the product. Second, the cost of full testing is relatively high, so those that are not tested are generally indicated by horizontal lines. Regarding these contents, we will only choose two categories that ordinary people are more concerned about to elaborate on: surface wear resistance and formaldehyde release.
1. Surface wear-resistant revolutions
National standards have three indicators for floor surface wear-resistance revolutions: commercial grade ≥ 9000 revolutions; household grade I ≥ 6000 revolutions; household grade II ≥4000 rpm.
Many owners are very concerned about the wear-resisting revolutions when buying floors, and many businesses are willing to promote the wear-resisting revolutions, but is the higher the wear-resisting revolutions, the better? Although the wear-resisting revolutions It is an important indicator that reflects the surface performance of laminate flooring, but it is not the only indicator. It also reflects the surface performance of the floor such as impact resistance, scratch resistance, stain resistance, smoke resistance and other technical indicators. However, the number of wear-resistant revolutions in the general test report is just a number, and there are many explanations behind this data.
You can skip this explanation about the wear resistance test. I feel dizzy when I read it. According to the European EN13329 standard, the test value of the wear resistance revolution can be divided into six levels. The test method for wear-resistant revolutions is based on EN13329. Use S-42 sandpaper to test three samples. Change one sandpaper every 200. In the four quadrants A, B, C, and D, there are clearly visible wear in three quadrants. The number of revolutions when worn is the initial wear value (ie IP value). In EN438, the test sandpaper changes every 500 times. Obviously, the IP value measured according to EN438 is much higher than the IP value tested according to EN13329. Nowadays, the test reports of many domestic products are based on the EN438 test method. There are many products on the market now with surprisingly high IP values. Most of the IPs are greater than or equal to 15,000 rpm, and some are even as high as 20,000 rpm. This has to make people doubt the authenticity of these data. The wear resistance value can be divided into initial value (IP), final value (FP) and average value (AT) according to different testing methods. FP is often 2000-3000 times greater than IP, while AT value is the difference between IP value and FP. average value.
For families, the initial value of wear-resistant revolutions (according to EN438) is greater than 5500 revolutions. Because most families have the habit of taking off their shoes when entering the door, the wear and tear on the floor caused by the movement of people is almost minimal. There is no need to think too much about the number of wear-resistant revolutions, otherwise you will fall into a trap and cause loss of profits.
2. Formaldehyde release volume
In the test report, the formaldehyde release volume is still just a data, and there is also too much content behind the data.
National standards currently have two classifications for formaldehyde release from floors: E0 level: ≤0.5mg/L; E1 level: ≤1.5mg/L, both of which use the "dryer method" test.
We know that formaldehyde is one of the main pollutants that pollutes the indoor environment. It is called the "number one killer" of indoor pollution and has been identified as a carcinogen and teratogen by the World Health Organization. The floor is one of the common furniture with the largest indoor paving area, and the floor releases some formaldehyde. Even the floor that meets the environmental protection standards will affect the indoor air quality due to its excessive area, thereby endangering the health of the family. This is the status quo of the industry, and it is this status quo that has prompted the launch of floor companions that remove formaldehyde pollution. However, many flooring companies or marketers are unwilling to face this reality and use various data or excuses to cover up the fact that even floors that meet national mandatory standards have pollution hazards, just like cigarettes that meet national production standards are equally harmful to smokers. Just as harmful. Whether it is an E1 or E0 level floor, there is a formaldehyde release problem, because the E0 level is just a level symbol, which does not mean no formaldehyde release. It is just a different amount of release. However, if formaldehyde is released, there are health risks.
Our common floor formaldehyde emission test report refers to sealing the four sides of the floor sample with formaldehyde-free aluminum tape, and the measured surface area is 450 square centimeters. Seal it in a vinyl bag and place it in an incubator with a temperature of (20±1)°C for at least 1 day. The amount of formaldehyde released on the upper and lower outer surfaces of the floor is measured. The critical temperature for the release of formaldehyde is 19°C, which is close to (20±1)°C, so the amount of formaldehyde released is actually not large at this temperature. This is also the reason why during the heating period in summer or winter, the amount of formaldehyde released from the floor will increase significantly because it exceeds the critical temperature for formaldehyde release. In addition, the amount of formaldehyde released around the floor is much higher than the amount released from the front and back of the floor provided by the test report. At the same time, during the floor paving process, we inevitably have to cut the floor to adapt to different ground conditions, which will lead to a large amount of formaldehyde release inside the floor. Therefore, in actual use, the formaldehyde release amount of the floor is much higher than the theoretical data in the test report. .
I am not surprised that the floor formaldehyde emission test report is zero, because after all, it is a product submitted for inspection. The surface of the sample can be specially treated, or the temperature of the experimental box can be lowered during the test, or you can do something weird. It is easy to apply some formaldehyde remover on the front and back of the floor before you send the sample. Anyway, the testing agency has no obligation to identify whether it is fake. It is easy to prove that your floor really does not release any formaldehyde. You can issue an authoritative test report for the floor base material. If the test report is also zero, then your product is really an environmentally friendly product! Because the floor base material The detection method uses the "perforation extraction method" test, and the detection unit is mg/100mg. Whoever dares to come up with zero formaldehyde and affordable technology will definitely make a sensation in the world. In fact, as early as a few years ago, relevant media announced that zero formaldehyde products do not exist.
(The test report is obtained from an Internet search and is only used for illustration. We are not responsible for its authenticity and are for reference only)
Summary 2: The data in the test report is only data. Although It is absolutely impossible not to have a test report.
Nowadays, many flooring companies or sellers have introduced many environmental protection concepts and special processing techniques in order to increase flooring sales. It is also very simple to verify the authenticity of what they say: please issue a single authoritative test of this performance. Report!