What safety precaution should be taken when using liquid penetrant testing materials?

In liquid penetrant testing, safety precautions are crucial due to the chemical nature of the materials involved, which can include solvents, dyes, and developers that may pose health risks. The correct answer emphasizes the importance of personal protective equipment, specifically gloves and eye protection.

Wearing gloves helps to protect the skin from potentially harmful chemicals present in the penetrant materials, which can cause irritation or allergic reactions. Eye protection is equally important, as splashes or aerosols can cause serious eye injury or irritation.

The other options highlight unsafe practices: avoiding ventilation can lead to the buildup of hazardous vapors, storing materials at high temperatures can increase the risk of evaporation or fire, and using penetrant materials near open flames poses a significant fire hazard due to their flammable nature. By ensuring the use of gloves and eye protection, individuals effectively mitigate risks and enhance their safety during liquid penetrant testing operations.