A research on encaustic links Botta with wax, a material that will mark his work for a long time. This initial love then leads him to create works with glass, lead, iron, and with natural elements such as fire, water, air. The art of drawing with light, transparency and lightness allows him to create increasingly rarefied works that underline an art of taking away, and which are placed on the border of visibility. It is a research of radical essentiality both in the elements and in the forms.