Clear explanations of common terms within lash extensions, PMU, and professional beauty treatments.
Updated July 25, 2026 · The glossary is updated continuously
B
Blooming
A whitish residue that can occur when the lash adhesive's curing is affected by humidity, fumes, the environment, or aftercare. Read the troubleshooting guide.
Bonder
A finishing product used according to the specific product's instructions. Read the product guide.
C
Cyanoacrylate
A group of fast-curing substances commonly used as the base in professional lash adhesives. Curing is affected by factors including humidity. Read the lash adhesive guide.
H
Hygrometer
An instrument that measures relative humidity at the workstation. Read the humidity guide.
Curing
The process where the adhesive transitions from a liquid state to a stable bond.
L
Lash Mapping
Planning lengths, curls, and zones to create a specific lash design. Read the mapping guide.
Glue Drop
The amount of lash adhesive dispensed onto a glue stone or palette, replaced when its behavior changes.
P
Primer
A pre-treatment product that can be used after cleansing when the lashes require additional preparation.
PMU
Permanent Makeup – cosmetic pigmentation using specific pigments, tools, and trained practitioners. Read the pigment guide.
R
Remover
A product developed to dissolve cured lash adhesive for professional removal.
Retention
How long an applied lash extension remains in place. Influenced by application, lash cycle, environment, product choice, and aftercare.
S
Sweet spot
The area on the tip of the tweezers where the grip is most stable. Read the tweezer guide.
Spikes
Longer, defined sections in a wispy set that are placed according to a planned rhythm in the lash map.
Sterilization
A validated process to remove all forms of viable microorganisms from an instrument. Read the hygiene guide.
V
Viscosity
A measure of how thick or thin (flowable) a liquid is.
Volume Fan
Several thin extensions shaped into a fan and applied to a single natural lash.
Missing a term?
The glossary is living content that connects the Academy guides. New terms can be added as our product range, techniques, and educational content develop.
