In a constant quest for a personal artistic style, over time Eusebio Sempere, who was also a member of the Parpalló group, went from abstraction to geometric simplification, seeking to fuse dynamism and movement, volume and three-dimensionality. Starting out from the premises of and , he shifted towards

 Op Art 

international art movement whose name derives from the abbreviation of the term Optical Art. The movement emerged in the late 1950s and reached its peak between 1965 and 1968. The goal of Op Art is to produce the impression of relief, depth or vibration through visual and optical effects. To achieve this end, artists explore the relationships between colour and space, with the aim of evoking the intended physical experience in the beholder. Artists were influenced by, among others, theories of pure visibility and the theory and philosophy of perception. Although it became popular all over the world, it was in Europe where the movement had its greater development, with figures like Victor Vasarely (1908-1997) and also Carlos Cruz-Diez (1923-2019) and Jesús Rafael Soto (1923-2005); although Venezuelans by birth, these last two artists had settled in Paris in the 1950s and belonged to the circle who gathered around Galerie Denise René. In Spain, one of the main representatives of Op Art was the Valencian artist Eusebio Sempere (1923-1985).

and Kinetic movements.

The line is the basic unit of his practice, which he employed to create spectacular effects and geometric volumes that appear to levitate in space. Through the use of colour and the line, generally in parallel, he managed to endow his works with movement and volume, sometimes generating a

 moiré 

the moiré effect or moiré pattern is a visual effect generated by overlaying two grids of lines at an angle or when the grids have slightly different mesh sizes. The origin of the expression comes from a type of silk or fabric with a rippled, “watered” effect.

-like effect.

Témpera is part of a series of gouaches he had made in the fifties and sixties on small black or ochre supports by means of inserting ascending, sinuous lines with contrasts of light and colour, looking for greater volume and sense of spatiality. For Sempere, light was of capital importance in his works given that, combined with colour, it is able to create optical illusions, and plays of lines and geometric forms that ultimately characterised the style of this great artist.