Biochalk Sdn. Bhd. is a the manufacturer of the BioChalk (EcoChalk), a truely water based white chalk that erase by a water cloth. <br/><br/>This Korea technology chalk is different from other countries' product in the market as it is more white, and easy to write on the green (black) board. <br/>It comes with 4 different colors; white, yellow, blue, red. <br/><br/>True Water-based White Board Marker pen & Ink - Please see the photos for the comparision with the existing marker pen or so call 'water based marker pen' in the market. <br/><br/>Board Eraser - an eraser developed based on thousands of teachers feedback. Easy to Hold, Easy to Wipe off the chalk.<br/><br/>Board Film Sheet - why need to pay ? why need to throw away the existing black (green) board to upgrade to white board ?<br/>A non refective, self-adhesive film is the solution. Just stick on existing board can turn into a white board, truely non reflective. Please see the photos.