Zsolnay

[1] During World War I, production of pottery and building materials were curtailed, and the factory produced for military use, for instance insulators.

After World War I, the fortunes of the factory declined due to the Serbian occupation, loss of markets, and difficulty to secure raw materials.

The process results in a light red iridescence of the first prepared hue, hence the term eosin (Greek eos, flush of dawn).

The eosin-based iridescence became a favourite of art nouveau and Jugendstil artists, among them Sándor Apáti Abt, Lajos Mack, Géza Nikelszky, and József Rippl-Rónai.

Fired at high temperature, this durable material remains acid and frost-resistant making it suitable for use as roof tiles, indoor and outdoor decorative ceramics, and fireplaces.

Architects that used the material in their buildings include Miklós Ybl, Ödön Lechner, Béla Lajta, Samu Pecz, and Imre Steindl.