Haft-rang

Haft-rang ("seven colors") is a Persian term for a decorative technique for underglazed ceramic tiles. This decorative technique is also sometimes described as "cloisonné", "cuerda seca" or "black line". It consists in using square tiles coated with a white glaze, on which multiple colors are applied and delineated with black painting, in order for colors not to bleed into each other, and the whole tile is fired in one step. This technique is decorative and relatively easy to deploy, especially compared to Mo'araq, but it does not permit an optimum firing process for each of the colors. Hence the colors are weaker, less intense, less clearly delineated, and the glazes not as strong.