Prepration of Zarrin Faam Glaze (luster Glaze) and Study of Effective Factors on Creation of Enamel Layer with Emphasize on Influence of Temperature and Thickness

Produce of Persian luster ware is doing inactive since about 14. century. Many of contemporary ceramists are interested to alive the forgotten fantastic and beautiful Iranian art. This research studies different factors، which have influence of successful processing luster enamel such as temperature، thickness of unburned layer and intensity and term of reduction. The differential thermal analyses (DTA) and thermo gravimetry (TG) diagrams of raw materials shows that the best range of reduction temperature should be 500-600°C. Industrial opaque glaze is a suitable basic glaze for luster enamel and wood ofwalnut can be a helpful reduction agent to produce an acceptable luster enamel. Thickness of unfired luster layer was a important factor to realize the effect and shining of luster by different enamel composition. Between three composition (M1، M2 and M3) the best results belong to M1 and M2، which could create golden and iridescent luster.