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Chalk Colored Chalk Dust-Free Chalk Factory Direct Sales

粉笔彩色 粉笔 无尘粉笔 厂家直销

  • EXW Price: Min. order:
    ¥1.5
    ≥600/piece
  • 600 piece
  • Exchage Rate 1 CNY ≈ 0.142 USD
  • Weight 20.0 kg/piece
  • Stock num 1000 piece
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  • Description

名称:无尘粉笔(微尘粉笔)

材质:石膏粉

颜色:彩色

包装:覆膜纸盒

用途:儿童学生绘画,家庭工业书写。

产品简介:粉笔的原材料也就是石膏,在日常生活中,豆腐重要的原料就是石膏了。我们的粉笔在制作的过程中没有添加任何其他的化学物质。当然再无毒也不能吃的哦。关于无尘,因为粉笔在写字时摩擦力和分子之间的引力共同作用的结果,产生了粉末。

Update time:20220412121915


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