From the second half of the 1920s Lajos Kozma's art can be characterised by the: effort crcate pure and practical fronl. According to him "this is a hath which requires that the artists should he sincere; they should devote all their energies to working on the material. Their creative power must beam with absolute certainty, which does not operate with ornaments borrowed form other places but throws their own soul into evenly single work of art." His interiors become lighter and lighter during his career; he uses enormous spaces witla little furniture which are made in a neutral style, and harmonize with their environment because of their cosiness.

The founder and his sons were respected for their excellent quality of production and high artistic level; they were also very honest in their business. Between the two world wars, thanks to these principles, the name Kner came to represent the best publications of Hungary.