Plaster board 3 days
Backing plaster 6 days
If just skim leave till pink and not dark/damp, will dry out very quickly a 4-5 days open windows/doors if poss to air room
Depending , usually couple of days but sometimes the waiting time may be overa a week to dry properly. But If the walls have a smooth finish with filler , the painting can be done in 24-48 hours time.
Ideally a week but you can tell when the plaster is dry enough to paint on
It depends on wall mterial,
Plaster board usuall dries faster. Preferably leave at least one week before paint and sometime may need up to 3 weeks.
2 days is a better for start painting
They say a week but as long as it all one colour lightened up 3 or 4 days should be fine also use proper undercote for fresh plaster or water down emulsion or it will flake off when you repaint the room later
Depending on the room temperature you should leave it around 18 to 24 hours. As you will be painting on a newly plastered wall/ceiling you should apply the same amount of water to the amount of paint used as the plaster will suck the moisture from the paint.
3 to 4 days depending on how warm the room is