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Curl letters are supplier conventions, not measurements. How each curl behaves, which one a lash direction calls for, and what curl cannot change.

Certificate, licence and insurance are three different things, and courses blur them. What to check before paying for training.

Aftercare cards fail because they list prohibitions. What actually protects a set: the 48 hour window, the daily habit, and three behaviours that matter.

A mega set is sold by fan count and lost at the base. What 8D to 12D actually specifies, why 0.03 fibre makes it possible, and where it fails.

J is the curl most ranges understock and most technicians misapply. Who it suits, where it fails, and how B sits one step above it.

A set lasts six to eight weeks, but individual extensions do not. How the natural lash cycle, the adhesive bond and client habits run three different clocks.

What to buy before your first set: practice lashes, training heads with a weighted base, and the small tools that keep a practice routine productive.

How to spec and stock a lash workstation: the tile, glue rings, fixing tape, eye pads, adhesive storage and gasket pads, plus the checks that matter.

What a lash sealant coating does to a bond, where it helps without overpromising, how it pairs with adhesive and remover, and how to stock it.

What a lash conditioner does, why oil content decides retention for extension clients, and how to source, label and stock it in a salon range.