Traditional Culture Encyclopedia - Weather inquiry - What if the seal turns black in cold weather?

What if the seal turns black in cold weather?

Heat treatment, using alcohol or gasoline.

1. Heat treatment: soak the seal with hot water or warm water, and then gently wipe it to remove black stains. This method is suitable for soft materials on the sealing surface.

2. Use alcohol or gasoline: soak the seal with alcohol or gasoline, and then gently wipe it to remove black stains. This method is suitable for hard sealing surface.