On the gels chapter there is a brief discussion on ricotta, and in the parametric table for cheeses it says that if you want to make dry ricotta you can add 0.7% salt, press it for 2-3 days in fridge, then hang for 2-3 weeks. 0.7% of what weight? The milk? or the ricotta you get? Is it added to the milk? I assume you press it in a cheese basket, with only a little weight? What are the environmental conditions supposed to be during the hanging?