Study

Why this carrier here

The study is closed for hours at a time and occupied continuously, which makes it the one room where a mid-strength carrier stays readable all day. The nose habituates but the room is small enough that the carrier keeps re-supplying the same volume.

Paper, board and books are the dominant surfaces, and they hold scent for a long time. A carrier that is pleasant for three days can still be readable in the spine of a book three months later, so dry, clean directions age better here than sweet or resinous ones.

Keyboard, cable and screen cleaning means nothing greasy or oily should sit at desk height. Keep the carrier on a shelf above or beside the desk, never on the desk itself.

Same room, other rung

Rung	Covers	One fill lasts	Rung matrix
L1	Barely there 1–5 m2	1-5 m2 of treated surface or enclosed volume; one sachet, one small plaque, two sprays on a cushion.	in preparation
L2	Close range 3–12 m2	3-12 m2; one 40-60 g wax tablet, one 60-90 g plaque, a four-reed diffuser, or three sprays on upholstery.	A 55 g wax tablet on a shelf above the desk, not on the desk
L3	Half the room 10–26 m2	10-26 m2; a six- to eight-reed diffuser, two plaques at opposite ends, or a diffuser plus a stone.	A 70 g plaster plaque on the shelf end of an 8.6 m2 study
L4	Whole room 18–30 m2	18 m2 and up, or any open-plan volume; two eight-reed diffusers, a diffuser plus two stones, or a diffuser plus a textile pass.	in preparation

2 live plan(s)

• A 55 g wax tablet on a shelf above the desk, not on the desk (L2 · 26 d · CNY 17)
• A 70 g plaster plaque on the shelf end of an 8.6 m2 study (L3 · 46 d · CNY 22)