Whether an old cast iron skillet is safe to cook with depends on its condition and how it has been stored. Here are some considerations:
Rust: If the cast iron skillet has developed significant rust over the years of neglect, it may not be safe to cook with. Rust can affect the integrity of the skillet and potentially contaminate food.
Seasoning: If the skillet was not properly seasoned or maintained, it may have lost its nonstick properties and developed a rough surface. Re-seasoning the skillet can help restore its nonstick surface and improve its safety for cooking.
Cracks or Damage: Check the skillet for any cracks, chips, or other damage. A damaged skillet may not heat evenly and can pose safety risks during cooking.
Odors or Stains: If the skillet has been exposed to strong odors or stains that are difficult to remove, it might not be ideal for cooking as these odors could transfer to the food.
Mold or Contaminants: Inspect the skillet for any signs of mold or contaminants, especially if it was stored in a damp or humid environment. If mold is present or if you are uncertain about its cleanliness, it's best not to use it for cooking.
If the cast iron skillet appears to be in good condition with minimal rust or damage, you can bring it back to use with proper cleaning and seasoning. Here's a general process to revive an old cast iron skillet:
Cleaning: Scrub the skillet with hot soapy water and a stiff brush to remove any rust, dirt, or debris. Avoid using harsh chemicals or steel wool as they can damage the seasoning.
Rust Removal: If there's stubborn rust, create a paste with equal parts baking soda and water and scrub the rusted areas gently. Rinse thoroughly.
Seasoning: Dry the skillet completely and apply a thin layer of vegetable oil or flaxseed oil to the surface, including the handle. Preheat your oven to around 375°F (190°C) and place the skillet upside down in the oven. Bake for about an hour, then turn off the oven and let it cool in the oven. Repeat this process a few times to build up a good seasoning layer.
After re-seasoning, the cast iron skillet should be safe to use for cooking. It's essential to continue properly maintaining it after each use by cleaning and re-seasoning when necessary. Remember that cast iron cookware, when well-maintained, can be an excellent addition to your kitchen and provide many years of cooking pleasure.