1. The ester solvent in the varnish reacts with the iron container to turn black when it meets with water.
2. Turpentine can easily produce reddish brown pigment in iron drums.
3. Gold and silver powder and varnish are prone to acid corrosion, which makes the color of the paint green, dark and lose its luster.
4. If the storage period is too long, the precipitation will change color.https://www.fhpails.com/