What is the reason why the PU color paste cannot be adjusted to the desired color?

The main reasons why the PU color paste cannot bring out the desired color:
1) The titanium dioxide content is inappropriate (colors with poor hiding power cannot be exhibited).
2) Improper selection of paint color paste (some colors cannot be replaced by other color pastes).
3) Color migration.
The solution for the PU color paste that cannot be adjusted to the desired color:
1) Choose a coating with appropriate titanium dioxide content.

2) Choose paint color paste with good compatibility.