What To Do With Different Rainbow Pigments?

I am new to gathering collectibles. I am trying to get script. My understanding is that I turn in certain collectibles in order to get that.

I have been flying around Dravanian Highlands stopping at every BTN and MIN node I see.

I have collected six different Rainbow Pigments with the following collectability ratings:
273, 412, 450(3), 525. None of them stack.

Are they worth anything? What can I do with them?

These are for the weekly delivery quest with Zhloe Aliapoh. You can unlock her in Idyllshire. Every week she'll ask for 6 collectable items from you and reward you with scrips and some story.
There's many of these weekly delivery quest NPCs, all with progress to max out your relationship with and a storyline to enjoy.

The collectables they ask for serve no other use or purpose in the game.

Thank you!