Recently, a fake 2B pencil caused the test scores to shrink. Weibo was rumored by netizens, causing many candidates and parents to pay attention. The candidates who are home-based are worried about buying fake 2B pencils. According to the Weibo, the China Pen Association has tested the true and false 2B pencils. In the case of the same option, the machine-readable card recognition results show that the true 2B pencil score is 100 points, while the fake only 87 Minute. What is the difference between using different pencils in the exam?

The card reader only recognizes the 2B pencil lead concentration

It is understood that pencils are divided into 18 models according to the concentration of graphite, soft and hard by 6B-9H. The more common "Chinese pencils" on the market are divided into 13 models from rich to light. The reporter also contacted the after-sales department of Zhonghua Pencil. The staff told the reporter that the current standard for filling the pens was carried out according to the national standard GB/T 26698-2011 "Testing Pencils and Painting Special Pens". Pencils should meet the requirements for high quality pencils with a hardness code of 2B. Now the professional test card reader can only recognize the lead concentration of the 2B pencil. If it is too thick or too light, it will cause the computer to fail or error.

The main component of a pencil is graphite, and it also involves a variety of raw materials such as wood and paint. The staff said that Chinese pencils have strict standards in terms of graphite concentration and hardness. Most of the counterfeit 2B pencils are less graphite or less in place, which is not conducive to the recognition of the card reader, resulting in shrinking performance. Not surprisingly. Therefore, when candidates purchase 2B pencils, it is best to buy them in regular shopping malls or supermarkets.

Expired pencils may cause the results to shrink

The reporter visited several stationery stores in the city to understand the situation. There are many kinds of test pencils in the stationery store. Regardless of the brand, there are ordinary wooden 2B pencils, automatic 2B pencils and 2B pencil sets with rubber and refills. The price ranges from 5 to 8 yuan. In a wholesale department of cultural and sports goods in Shangdu, the reporter saw several Chinese 2B pencils with slightly different quality, but the boss said that it was only a batch problem, and they sold genuine products.

"There was indeed an unqualified 2B pencil, but it was difficult to see it near the exam period." Ms. Qiu, a stationery store owner near the fourth experimental primary school, told reporters that in addition to inferior pencils, expired pencils may cause the card reader to be unrecognizable. And many candidates who buy will not notice this problem. Does the pencil have a shelf life? The reporter then inquired about the relevant documents. The national standard “Painter Pencils and Painting Special Pens” indicated that the shelf life of the special card for painting is two years from the date of production. The finished products should be stored in a dry and well-ventilated warehouse with a storage temperature of 0 °C- 40 ° C, the relative humidity is not more than 80%. The owner told reporters that the genuine pencil transport packaging, that is, the sales package will have a production date and shelf life, candidates must pay attention to when buying.

A variety of methods to identify 2B pencil true and false

Although the exam school will distribute 2B pencils before the major exams such as the college entrance examination and the senior high school entrance examination, many candidates will still prepare one or two pencils for the occasional needs. In addition, there are many 2B coated pencils for the preparation of exams and professional title exams. Many merchants recommend one of the best-selling Chinese suits. The products use digital anti-counterfeiting technology. Each set has a digital anti-counterfeit label. Candidates can obtain the product verification code by scraping the anti-counterfeit coating. Know the authenticity of the product for a while.

In addition to the purchase of 2B pencils with their own security code, China's first pencil company also asked how to distinguish the authenticity of the pencil:

1. Compared with the logo, put a few pencils together and compare them. See if the positions of the “2B” marks on the three sides of the pen are exactly the same, and the jagged ones are fakes;

2. Look at the wood, the real wood is moderately soft and hard, all are eucalyptus, the texture is like a dark red color; while the fake is only painted with red color at the top, the wood is white or light yellow after cutting, due to the cost reduction Wood treatment, so the pencil feels very hard and cracks easily when sharpening the pencil;

3. The authentic handwriting is printed finely, the fake printing is blurred, the printing distance is uneven, and the paint is black and the surface is not smooth.

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