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About product and suppliers:
        Alibaba.com offers 4,966 blackboard chalk products. About 34% of these are blackboard, 7% are chalk, and 3% are whiteboard. 

A wide variety of blackboard chalk options are available to you, such as no, yes. You can also choose from free samples, paid samples. 

There are 4,953 blackboard chalk suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Hong Kong, and India, which supply 98%, 1%, and 1% of blackboard chalk respectively. 

Blackboard chalk products are most popular in North America, Western Europe, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 815 with Other, 743 with ISO9001, and 422 with BSCI certification.