I Concentric before decorative. Every square is laid inside its circle first; ornament is the last hand to touch the ground, never the first.
II Gold from a single leaf. One ground of pigment carries every line of script — the border is one continuous field, not forty syllables stacked.
III Dark ground reads as lacquer. The aubergine field is burnished, not painted — depth comes from layers of gum and soot, set to dry for a season.
IV Ranjana runs vertically. The mantra border hangs from the top edge and descends — script is architecture here, not text the eye is asked to read.