Institutional Dye

[Ongo]

Good Day All,

I have recently been obliged to use Fiebings Institutional Dye instead of their Spirit based dye.

I achieved excellent results by dilution and then finished with Institutional Dye Finish.

What I would like to ask is the following:

What does the "Finish" do?

I spilled some dye on my fingers and it took ages to wash away. I ran some test pieces under water with no effect.

So why do I need to apply the finish?

Any information will be appreciated.

Thank you.