Kautilya's Arthashastra 4.1.41

4.1.41

kālāyasapiṇḍaḥ pañcabhāgakṣayaḥ //

Fees for the manufacture of articles from copper, brass, vaikrinataka, and árakúta shall be five percent. In the manufacture of articles from copper (?), 1/10th of the copper will be lost. For the loss of a pala in weight, a fine of twice the loss shall be imposed. This explains the proportional increase of punishments. In the manufacture of articles from lead and tin, 1/20th of the mass will be lost. One kákani shall be the fee for manufacturing an article of a pala in weight of the above. In the manufacture of articles from iron, 1/5th of the mass will be lost; two kákanis shall be the fee for manufacturing an article of a pala in weight from iron. This explains the proportional increase of fees.