At the heart of Blattmann's technique is the use of oil paint, complemented by an impressive variety of additional materials such as gold leaf, acrylic, charcoal, felt-tip pens, wax and lime. These elements are not chosen at random; they are the result of a deep experimental process in which each material is carefully selected to achieve the desired emotional and visual effect. This technique creates a vibrant and dynamic palette that gives Blattmann's works extraordinary depth and texture.