wash...

so i'm new to this wash thing. i bought a bottle and i'm wondering if i can use it straight out of the bottle as is or do i need to dilute it?

Can you be a bit more specific with your question.

Did you buy a specific product for use as a wash?

If it is labelled as a wash, I am sure you can use it as such without diluting it.

the bottle is labeled "citadel colour" black ink. i bought it at a place that sells resin figures.

i use citadel ink for all my washes. It's good stuff. when i use it i usually dilute it...and it is also wise to add 1 or 2 drops of dish washing liquid to the whole jar.
as the dish washing liquid breaks up the surface tension and allows the wash to flow easier and settle in the low spots better.
hope it helps. PM me for more details
laters, WIDE