As the most common school supplies, pencils are used every day by preschoolers and elementary school students, but the safety of pencils is rarely known to parents. A survey by the reporter found that when parents purchase pencils for their children, they mainly consider the shape, color, and price of pencils, but they often overlook the safety of pencils. In fact, if the pencil is not safe enough, it will bring huge hidden dangers to children's health. For example, lead in pencil can damage the nerves, hematopoiesis and reproductive system of children and adolescents, impede children's growth and development and intellectual development, and harmful in inferior pencils. Heavy metals can even damage children's organs.
What are the effects of toxins that may be contained in inferior pencils on children's health? After interviewing a number of pediatric chief physicians at the City Children's Hospital, the reporter learned that the heavy metals contained in the pencils may be carried into the human body due to friction with the human body or a suitable solvent. Soluble heavy metals accumulate a certain amount in the human body, causing great harm to the human body. For example, the impact of lead on the health of children and adolescents is mainly manifested in damage to the nerves, hematopoietic and reproductive systems of the human body, impeding children's growth and development, and intellectual development. Heavy metals in pencil also harm children's organs.
How to buy a safe pencil with good quality and low price, Le Yi, a relevant person in charge of a well-known pencil company, summarized for parents how to judge the six “cheats†of the safety pencil:
The first step is to “see†and select a pencil. First, check the trademark, origin, and certification “three marks†on the product packaging, and then check whether the pencil's pen is straight and whether the lead is located in the middle of the pen shaft. How many, normal pencil pencil lead diameter is generally 2.2mm, poor quality pencil only 1.7 or 1.8mm, as well as lead core is easy to break and so on. It should also be noted that the pencil wood may be bleached. If the wood is too red, stains are most likely added. Such pencils have more toxic substances. Parents can give priority to wood pencils, which have natural lines and do not contain bleaches and stains that are harmful to the human body.
The second step is “touchingâ€. By touching the pencil, you can feel whether the pen body is smooth, has no flu, and body hardness.
The third step is to “smell†and feel the smell of wood, whether the pencil has a pungent smell and whether it has a paint smell.
The fourth step is to "write" and actually use a pencil to try out how smooth the writing is.
The fifth step is “cuttingâ€, using a pencil sharpener to check if the pencil is easy to roll and to see the degree of adhesion of the pencil shavings. The high-quality pencil lead ink should be connected with the wood of the pen and the lead core should be uniform.
The sixth and most important point is to “pass†and focus on checking the inspection standards passed by the pencil manufacturers, including production standards and safe use standards. At least the pencils that meet the national standards should be selected. It is better to select various metal elements. Requires more stringent brand pencils that meet international standards.
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