Which statement correctly identifies a strength of wet nonaqueous developers for inspection on accessible surfaces?

• A. Very portable spray form and rapid, well-defined indications
• B. Indications are dim and blurred
• C. Coating is translucent and provides poor contrast
• D. Easily cleaned from the surface after inspection

Answer: (A)

Wet nonaqueous developers are solvent-based liquids applied as a spray on accessible surfaces in liquid penetrant testing. The key benefit comes from the solvent carrier, which evaporates quickly and leaves a crisp, high-contrast background that makes faint penetrant bleedages stand out. This combination—a portable spray form and fast, well-defined indications—lets inspectors cover surfaces efficiently and spot defects clearly, even on complex shapes.

Indications that are dim and blurred, or a translucent coating with poor contrast, would hinder defect visibility and are not characteristic strengths of this developer type. Likewise, being easily cleaned after inspection isn’t a defining advantage here, since solvent-based developers often require appropriate cleaners and aren’t chosen for easy removal as the primary benefit.