Study on Emorescence or Ceramic Objects ofArcheological Excavation

EfIloresce means formation or crystals or whitish deposits on the surfaces of objer.:ls. The appeflrance of these crystals are due to the type ot" <lrt works, pigment, binding factor used, conselVation treatments and the environment in which the objects arc kept. In order to study the components of eftlorescence and the reasons for thier formation, samples were collected from the sedimenls present on the surface.chr('39'). of twenty six ceramic objects. 111cse objects were excavated from regions with different dimaticconditiolls, Hnd were all unglazed, and belonged to the first or second millcnium BC. Fourier transform infrared spectroscopy (FT~ JR), X~ray diffntction (XRD) and wet chemical analysis were used for analysing of these minute samples. The results showed thAt the deposits consisted 01" either one or ,1 mixture of hchr('39')Ypsum, r.:alcitc, hydrated ferric chloride, feldspa r, pyroxene, hematite and halite. Also the soil of region was analysed <lnd the effects of the cnvironmental ("actors on components and amount of cfllorcscence w.]s studied.