To achieve the best result I would recommend you to use Pipettes. If you don't have time, just use 1 colour of your choice and decorate ready soap with mica.
In the photo, I used Soap Colourants by Eternity Lavender and Lemon.
Dimensions of the ready soap:
- Height: 5.5 cm
- Diameter: 7 cm
- Weight: 30 g