घनं सुषिरं पृषतादियुक्तं क्षुद्रकमिति ॥ कZ_०२.१३.४० ॥
ghanaṃ suṣiraṃ pṛṣatādi-yuktaṃ kṣudrakam iti
Work that is solid, or hollow, or fitted with speckled/patch-like additions (and the like) is termed “kṣudraka” (inferior/cheapened work).
Hollowing reduces precious content while preserving external appearance, a classic method of value theft.