{"product_id":"nihon-rikagaku-industry-rikagaku-6-dustless-chalk-0919","title":"Rikagaku 6 Dustless Chalk For School Blackboard: White, 3 Colors, Red, Yellow, Blue, Green, Brown, Purple, 6 Multicolor, Dark Red, Gray, Direct From Japan","description":"Dustless Chalk is the flagship of Nihon Rikagaku Industry, a Japanese maker long recognized for employing people with disabilities across its workforce. The chalk is calcium carbonate based and, since a 2005 reformulation, every stick contains fine powder milled from recycled scallop shells, a byproduct that would otherwise be discarded. Grinding the shell down to around five microns made the sticks stronger against snapping and smoother on the board; because the resulting particles are heavier, dust falls rather than drifting, so it settles less on clothes and shelves than ordinary chalk. It writes densely on green and black classroom boards and erases cleanly with a standard felt eraser. This blackboard grade is sold in 6-stick boxes across a wide color range: plain white, yellow, a 3-color assortment, a 6-color multicolor box of red, yellow, green, brown, blue and purple, plus dark red and gray. Suited to classrooms, tutoring centers, cafe menu boards and home study walls. Color and set contents vary by box. Made in Japan by Nihon Rikagaku Industry.","brand":"Nihon Rikagaku Industry","offers":[{"title":"Default Title","offer_id":49767175225559,"sku":"4904085111612","price":200.0,"currency_code":"PHP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0816\/5743\/0231\/files\/sg-11134201-7rdyn-lyxa0ms14awcc0.jpg?v=1789104386","url":"https:\/\/www.smikiejapan.com\/zh-ph\/products\/nihon-rikagaku-industry-rikagaku-6-dustless-chalk-0919","provider":"SmikieJapan","version":"1.0","type":"link"}