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Cylindrical-quality color clean the Blackboard special write 100 pieces of chalk
| Packaging information: |
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| Item code: 7511-4 | Material: plaster | Specifications: 100 PCs/box |
| Type: dustless chalk | Origin: Yiwu | Trade properties: foreign trade, domestic |
| Color: color | Length: 7.5*1*0.8 |
Baby details
Features:
1. solid chalk, image appearance;
2. the use of high quality raw materials, special technology, precision production;
3. dust a slight, dust flying;
4. plastic light;
5. the fine texture, easily write, mute;
6. the text is clear;
7. color, pure;
8. high quality finish;
9. easy to scrub it;
10. convenient, inexpensive, high market penetration.
Disadvantages:
You cannot 100% clean, will produce some dust.
Related knowledge:
Chalk is a widely used tool in daily life, generally used for writing on the Blackboard. Ancient chalk, usually made of natural chalk, but nowadays number replaced with other substances. Chalk compositions is a white precipitate of calcium sulfate, not easy to be broken down, particles larger than dust. Now, the main general domestic use chalk chalk and dust free chalk two, whose main constituents are calcium carbonate (lime) and calcium sulfate (gypsum), or containing small amounts of calcium oxide.
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Purchase Note: batch is different, the color may be different due to chalk and brittle, we packed as tight as possible, but do not guarantee that each complete. Mind to kiss carefully.
