I have been into chalk production for some months now and I am enjoying it. So far my chalk is good and selling fast but I have a challenge now. The business is about to move to the next level but I have been asked to improve the quality; precisely to make it to last longer and very smooth. Please apart from the general materials used I need an idea about any other material to be added to the chalk mixture to make it lighter, smooth and most importantly to last longer. Reasonable answers please. One love!