All the colour here is done by Liusha, which is why the booking form only offers colour on the days she is in. Three days a week, and they fill up about a fortnight ahead.
A patch test comes at least a day before any colour or foils. It takes two minutes and we will not skip it. The price is quoted at the basin before anything is mixed, and if the figure is not what you expected you can stand up and leave owing nothing.