You answered my exact question!!! Thank you!!! Also thanks for the tips ur great! MAybe one day I'll be able to help u out with something!As long as it is a clean sterile surface ink in the caps is usually there 4 hours or so. Black maybe longer like 6hrs. I usually wait till I am done outlining at least before I put out the colors. They tend to dry up, you can add a couple of drops of distilled water to them to help with that.
What are you exactly asking? If you mean can it sit overnight or something that would be a negative.