Easy to mix to convert into broken chalk.
Mix 6 parts chalk to 5 parts water in a bucket and let sit in the sun.
In one day you will have broken chalk! 11 lb per bag.
WARNING: The product can expose you to chemicals including Di(2-ethylhexyl) Phthalate, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.