Transparent Black vs Ink Black

How close are they?

ΔE 8.4, close: similar, with a visible difference side by side. Ink Black is a little darker than Transparent Black.

Can I use Ink Black instead of Transparent Black?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Ink Black is a little darker than Transparent Black.

Can I use Transparent Black instead of Ink Black?

The same difference applies the other way round: Transparent Black is a little lighter.

ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.