NIC Nail Technician Written ExamNail Technology ProceduresHard

A technician is applying a full set of sculptured gel nails. After applying the first builder gel layer and curing, what is the correct next step before applying the second builder gel layer?

  1. AApply a top coat.
  2. BApply cuticle oil.
  3. CFile and shape the nail.
  4. DRemove the inhibition layer.
Show answer & explanation

Correct answer: D. Remove the inhibition layer.

Most gel systems leave a tacky 'inhibition layer' after curing. This layer must be removed (cleansed) before filing and shaping to prevent clogging files and to ensure a clean surface for subsequent layers or filing. Some non-wipe gels may not have this, but for builder gel, it's standard.

Why the other options are wrong

  • A. Top coat is the final layer, applied much later.
  • B. Cuticle oil is applied at the very end of the service.
  • C. Filing and shaping typically occur after the structure is built and the inhibition layer is removed, or after the final builder layer.

Gel Inhibition Layer

The tacky, uncured surface layer that remains on most UV/LED gels after curing, which needs to be removed for proper shaping or subsequent applications.

  • Composed of uncured monomers due to oxygen exposure during curing.
  • Must be removed with a gel cleanser or isopropyl alcohol before filing or applying certain subsequent layers.
  • Helps with adhesion between layers, but needs removal for shaping or non-tacky layers.

Memory trick: First gel done? Wipe the sticky, then build the fun!

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