Ingredients for a solid shampoo - 40 g of SCI - 20 ml water - 15 g organic stinging nettle powder - 15 g organic white mustard powder - 10 ml organic coconut oil - 10 ml organic calendula macerate - 2 g yellow or white beeswax - 3 g organic vegetable glycerine Material - a pan for your water bath - a stainless steel bowl - a spatula - a mini whisk - a precision scale - a mould of your choice (e.g. silicone kitchen mould or DIY recycling mould) Preparation 1/ Be sure to wear a mask and eye protection as SCI is highly volatile and can be irritating. 2/ Melt the SCI surfactant with the water, coconut vegetable oil and beeswax in a water bath and mix gently with a mini whisk. 3/ Add the nettle and white mustard powders and mix well. 4/ Remove from the heat and add the calendula macerate. Mix well to incorporate the SCI into the rest of your preparation to obtain a paste. 5/ Add the vegetable glycerine and mix again.