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2. Blackboard - Wikipedia

   en.wikipedia.org/wiki/Blackboard

   Learn about the origin, design, and advantages and disadvantages of blackboards or chalkboards, reusable writing surfaces made with chalk. Find out how chalkboards are used in education, restaurants, and art, and why they produce a distinctive sound.

3. Chalkboard art - Wikipedia

   en.wikipedia.org/wiki/Chalkboard_art

   Chalkboard art or chalk art is the use of chalk on a blackboard as a visual art. [1] It is similar to art using pastels and related to sidewalk art that often uses chalk. Chalkboard art is often used in restaurants, shops or walls. [2] Chalkboard art has also been done on large boards while storytelling on beaches and in Churches.

4. Hagoromo Fulltouch Chalk - Wikipedia

   en.wikipedia.org/wiki/Hagoromo_Fulltouch_Chalk

   Boxes of Hagoromo Fulltouch Chalk, produced by Hagoromo Bungu. Hagoromo Fulltouch Chalk (Japanese: 羽衣フルタッチチョーク, Korean: 하고로모 풀터치 분필) is a brand of chalk for blackboards originally produced by Japanese company Hagoromo Bungu (羽衣文具), and since 2015 by South Korean company Sejong Mall (세종몰).

5. Edwin Binney - Wikipedia

   en.wikipedia.org/wiki/Edwin_Binney

   Edwin Binney was an American entrepreneur and inventor who created dustless chalk and co-founded Crayola crayons. He also had a passion for fishing and community development in Florida, where he owned a large estate called Indrio.

6. Should You Be Worried If You've Been Eating Chalk? - Healthline

   www.healthline.com/health/eating-chalk

   Eating chalk is a symptom of pica, a type of eating disorder that involves craving non-food substances. Pica may be linked to nutritional deficiencies, pregnancy, or OCD, and can cause digestive ...

7. Whiteboard - Wikipedia

   en.wikipedia.org/wiki/Whiteboard

   A whiteboard is a glossy, usually white surface for making non-permanent markings with markers and erasers. Learn about the invention, evolution, and applications of whiteboards, as well as the different materials and features of whiteboard surfaces.