It doesnt matter how much wax you use, but weigh it before you begin to know roughly how much fragrance to add later. Your soy wax can be melted on the stove in a saucepan or in the microwave in a microwave safe container. It is one of the rare waxes that can be safely melted like this. Melt your soy wax using your method of choice. If using a microwave zap for 30 second intervals, stirring in between until melted. Add a piece of colour tab until the desired colour. Allow to cool a little and then add around 5% of the weight of the wax you have and mix well. Pour the wax carefully into your tart mould or clam shells and allow to set. When completely cold remove your tarts or close and label your clam shells. Ideally you should let them cure for 24 hours before use, but if you cant help yourself use one now :-)