The old ways aren't always best The reason the paper needs to be produced "behind nearly closed shutters in a quiet room" is to prevent the patterns on the surface of the water being disturbed by draughts; as for the "clean containers and pure water," these prevent the spread of the pigments being affected by contaminants.
尊古卻不泥於「遵古」在製作環境方面，之所以要「虛窗幽室」，是為了為防止水面上紋路因風吹而亂動；至於「明磐淨水」，是為了防止不潔淨的容器及水質影響色料的擴散。