1. Observe the paint condition
Separation or sedimentation: If the paint shows obvious separation (e.g., sediment at the bottom, thin layer at the top), invert it to mix thoroughly.
Clumping or discoloration: If the paint cannot be evenly mixed after stirring, or if the color is abnormal (e.g., yellowing or blackening), it may have deteriorated and needs to be inspected by inverting it.
2. Check the storage time
Lead-containing anti-rust paint: Invert it every two months to prevent sedimentation and clumps.
Conventional paint: If the paint has been stored for more than one month without use, it is recommended to invert it and stir to test its fluidity.
3. Smell and feel
A strong odor: If the can is strongly odorous after opening, it may be due to oxidation caused by a poor seal. Invert it and inspect the seal.
Abnormal viscosity: If the paint is too thick or too thin after inversion, storage conditions may need to be adjusted or it may need to be discarded. 4. Pre-use Test
Small Area Trial: After stirring, invert the container and apply to a small area to observe leveling and proper adhesion.
Notes:
When inverting, ensure the lid is tightly sealed to prevent leaks and air ingress.
Paint stored for long periods should be inverted regularly. However, if the paint has expired (expired), it should be inspected for deterioration.
