... EN71,ASTM-D4236,ICTI,GSV. This is Bo Wen Plastic stationery limited. our factory is located in dongfeng idustarl, xinxu toun ... ,huiyang district,huizou city,guangdong ,china. we produce many style chalk, such as: color chalk,school ... ,sidewalk chalk,dustless chalks,shape chalk,jumbo chalk,shape chalk,stationery chalk,chalk set,chalk pain and so on, and we ...