Koper Slovenia Cruise Port Location: The passenger port is located about 300 meter from the main town square with its cathedral, cafes, restaurants and main tourist attractions.
A typical Henna type takes around an hour to dry and give good color. I prefer to keep henna longer than 1 hour because even if a henna tattoo has dried, it does not mean that it has given the best possible color. I suggest keeping a Henna tattoo on your body parts where it is painted for around 2-3 hours.
When I use henna, I leave it in for no longer than 2-3 hours. You didn't mention color, so I will assume you are going for conditioning only. For color, you will need to leave it in for a longer timeframe, 4-6-8 hrs depending on your original hair color and what you're going for.