Liquid castile soap, NZ
It is non-toxic and good for people who suffer from sensitive skin. It can help soothe and calm eczema, psoriasis and acne, also helping prevent the formation of acne by killing bacteria that causes it at the same time as not clogging pores.
Each essential oil will react differently, some making it much thicker, others only slightly. Variations in colour will also occur.
Add essential oil at about 0.5% to 1% (1-2 tsp per kilo of base).