ZL-56

Level 4 Water Washable Fluorescent Penetrant

ZL‑56 is a Level 3, post-emulsifiable fluorescent penetrant formulated for high-sensitivity non-destructive testing. It’s ideal for detecting extremely tight or fine discontinuities on critical components. Due to its high sensitivity, ZL-56 is best suited for aerospace, nuclear, and other safety-critical industries.

Features

High sensitivity (Level 3): Detects very fine surface defects for critical inspections.
Post-emulsifiable: Provides controlled removal with lipophilic or hydrophilic emulsifiers.
Excellent brightness and contrast: Fluoresces a vivid yellow-green under UV-A light.
Low background: Offers clean indications with minimal background fluorescence.
Aerospace-approved: Complies with major industry standards including AMS 2644.

Applications

Inspection of turbine blades, aircraft engine parts, and critical aerospace components.
Detection of tight cracks, porosity, and laps on precision-machined surfaces.
Nuclear and power generation component testing.
Used where water-washable penetrants might remove indications prematurely.

Technical Data

Specification	Details
Type	Post-emulsifiable Level 3 fluorescent penetrant
Sensitivity Level	Level 3 (high)
Removal Method	Post-emulsifiable (lipophilic or hydrophilic emulsifier required)
Fluorescence Color	Bright yellow-green under UV-A light
Applications	Aerospace, nuclear, turbine, safety-critical part inspection
Compliance	AMS 2644, ASTM E1417, ISO 3452
Developer Compatibility	Compatible with ZP‑4B, ZP‑5B, ZP‑9F