The national flag was made with salt by 1,180 students of Sigaram Matriculation Higher Secondary School in their premises at Chettiyappanoor, Vellore, TN on the eve of Republic Day 2015. Starting work at 6.30 am they completed the 3,456 sq m flag at 11.30 am using 43,200 kg of salt and 1,600 kg of colour powder.