Blackening agents for metal *Sealing and Post-Treatment After the blackening process, it is crucial to seal the oxide layer to enhance corrosion resistance and durability. Common sealing methods include: 1. Oil Sealing: Submerging the blackened part in an oil-based solution. 2. Wax Sealing: Applying a wax coat for a dry finish. 3. Acrylic or Lacquer Coating: For a more durable and non-oily finish. *Safety and Handling 1. Personal Protective Equipment (PPE): Use gloves, goggles, and aprons to protect against chemical splashes. 2. Ventilation: Ensure good ventilation to avoid inhalation of fumes. 3. Chemical Handling: Follow manufacturer guidelines for safe handling, storage, and disposal of blackening agents.