Charak Samhita
संयाव इव निर्यासे मध्यो दर्वीं विमुञ्चति। शीर्यमाणे तु निर्यासे वर्तमाने खरस्तथा॥१०३॥
If the kalka turns to niryasa (gum like) is called as mridupaka, becomes round soft mass then it is madhyama paka and paste disintegrates during wicking is known as kharapaka.
english translation
संयाव इव निर्यासे मध्यो दर्वीं विमुञ्चति। शीर्यमाणे तु निर्यासे वर्तमाने खरस्तथा॥१०३॥
If the kalka turns to niryasa (gum like) is called as mridupaka, becomes round soft mass then it is madhyama paka and paste disintegrates during wicking is known as kharapaka.
english translation