Question

why do we add sand while preparing the pigment extract​

Answer 1

Answer:

it makes the pigment hard and not break

Answer 2

Addition of sand while preparing pigment extract

Explanation:

• Sand is used as an abrasive agent during plant pigment extraction processes.
• Plant cells are made up of tough cell wall containing cellulose and sand like quartz sand is used along with the leaves or the plant part from where the pigment is to be extracted.
• The leaves are crushed or ground along with sand which helps the break the leaf tissues, grind, bind with water and homogenize the mixture.
• Anhydrous sand is used to prepare a slurry kind of free-flowing mixture which is later treated with acetone to extract the pigment.