Overnight usually, regardless of what time of day they were printed, so effectively 16-24 hours. They probably don't actually need that long, particularly in summer, and I have occasionally sprayed the odd one or two within a matter of hours after printing with no apparent ill effects, when they were needed at very short notice, but I prefer to err on the side of caution where possible. (iPF8300 with Lyve and either Glamour II or Timeless applied with a Fuji HVLP)
Malcolm
