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Home > News > Be wary of chalk ash is harmful

Be wary of chalk ash is harmful

2019-11-27

Chalk teaching aids are an indispensable tool for teaching. It is one of the most primitive and traditional teaching methods. It has been used for thousands of years since its application. With indelible contributions, with the advancement of history and the development of society, human understanding of chalk teaching aids has been continuously improved, that is, chalk has made great progress and made great contributions to human education, as well as classrooms for educational undertakings and Students bring great harm. Chalk teaching aids are an indispensable tool for teaching. It is one of the most primitive and traditional teaching methods. It has been used for thousands of years since its application. With indelible contributions, with the advancement of history and the development of society, human understanding of chalk teaching aids has been continuously improved, that is, chalk has made great progress and made great contributions to human education, as well as classrooms for educational undertakings and Students bring great harm.
Here are a few sets of data that I hope will draw attention:
First, through the system dynamic model to study the distribution and harm of classroom dust, it is found that in the 3m diameter space of the podium, the working environment competes with the severity of the chalk damage caused by the workers in front of the steelmaking furnace.
Second, according to incomplete statistics, the average annual inhalation of chalk by a full-time teacher in China is as high as 250-260 grams, so more than 20% of the people with lung disease and cancer deaths are teachers.
Third, In 1993, the average life expectancy of ordinary people in China was 72 years, while the average life expectancy of teachers was only 59.3 years.
According to the survey data of the whole country and some provinces and cities, with the advancement of society and the acceleration of social rhythm, the occupational morbidity rate of teachers has been increasing year by year, and occupational diseases have developed in diversified directions. Among them, dust pneumoconiosis caused by dust and various acute and chronic respiratory diseases are China. At present, the most important occupational disease is the most serious and widespread one. The prevalence of myopia in students has also increased year by year, to an extremely serious degree.
Because the chalk contains carcinogens, the China Center for Disease Control and Prevention shows that the cancer incidence rate of 38 million full-time teachers in China accounts for 20% of the total cancer incidence rate in the country, which is 8 times higher than that of the general population. So don't ignore the most common deadly threats around us. I did not expect the hero of education - chalk is the first culprit to endanger the health of teachers and students and damage the equipment of audio-visual equipment. The harm of chalk ash to the majority of teachers and students, the pollution of the environment and the violation of the audio-visual facilities are obvious to all. Breaking the tradition, the use of environmental protection dust-free teaching board is imminent.
Specially developed for dust-free teaching in primary and secondary schools, our matte writting board film can adapt to the writing and wiping characteristics of many kinds of pens, so easy write smoothly and wipe without dust and residue. Contains high-performance magnetic powder, strong adsorption, can be directly adsorbed on the surface of the old chalkboard to achieve the purpose of upgraded the old chalkboard. At the same time, special matte finish make projectable. It is both a dust-free teaching board and a projection screen, matching best colorful dust-free chalk if you need.

Projector Whiteboarddust free chalkchalk
Guangzhou New Magnetics Technology Co.,Ltd Business Type:Distributor/Wholesaler , Manufacturer , Trade Company Product Range:Wallpapers/Wall Coating , Other Educational Toys , Whiteboard Products/Service:soft whiteboard , flexible whiteboard , whiteboard sheet , magnetic accessories , flexible chalkboard , dry erase boards Certificate:ISO9001 , RoHS , Test Report Company Address: 3rd Floor, Xinglong Building, No.1, Shijiagang Middle Road, Guangzhou, Guangdong, China Previous: Google pushes new hardware: "whiteboard" can also be very high-tech Next: What is the knowledge of whiteboard?

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