राजतानां विस्रं मलग्राहि परुषं प्रस्तीनं विवर्णं वा दुष्टमिति विद्यात् ॥ कZ_०२.१४.५४ ॥
rājatānāṃ visraṃ malagrāhi paruṣaṃ prastīnaṃ vivarṇaṃ vā duṣṭam iti vidyāt
当银具有臭味、易吸附/滞留污垢、触感粗糙、过度硬化而脆、或颜色变异时,应认定为劣银。
Odor can indicate contamination or alloying with reactive/impure substances; the text treats sensory cues as admissible inspection criteria.