Thank you for your reply Filip,
Your sollution helped me but I could not get what I want.
I was thinking about a text but instead of the text, I want a logo (with multiple colors) that appears in my intro.
I want to start with a white solid on which only this logo, with the colors of the film, is visible.
(To create this, isn’t a problem (logo and movie as an Alpha matte))
Now it is the intention that the ink shows both the film and the logo.
I made 2 pre-compositions; one with the main movie and the ink movie as Luma matte and another with the logo and the ink movie as Luma matte.
Now the entire logo and film are already slightly visible already before the ink becomes visible. Changing the transparency for a few seconds does not help because, after those x seconds, the logo and film next to the ink are visible again.
How can I make sure that only the part with the ink is visible? That the opacity of the other part is 100%.
Because I want to use multiple ink films at different positions, I also see an overlap between these ink films. This is because the background colors of these videos are slightly different from each other:

Is there a sollution to solve this problem?
And, at the beginning of my main composition, I can’t manage to see only the logo in the background colors/ movie colors before the precompositions start.
I’ve add the logo and the movie to the main composition. And the movie is an Alpha matte which only shows the logo in the background movie colors. But this doesn’t help.
Thank you for your help.