Sunday, 10 October 2021

How to Test for Pure Zari in Kanjivaram and other Sarees



A few testing laboratories in Kanchipuram provide this service. This is what this portal has to say about the testing method:

In order to build the confidence and credibility among the customers and in the industry about the quality of zari in silk fabrics, testing is very important and much required.  Hitherto, for testing metal contents in zari, destructive method of testing has been carried out.  Now, the testing of zari samples and zari made fabric are carried out by Non-destructive testing (XRF Analyser), which is a unique one.  The technical know-how of the project was jointly developed by Technology Information, Forecasting and Assessment Councils (TIFAC) and Tamil Nadu Zari with the guidance of the Indira Gandhi Centre for Atomic Research (IGCAR, Kalpakkam).

The Zari is sold in terms of MARC.  Weight of one marc is 242 grams.  The composition of the marc is indicated below: -

                              SILVER     55        to     57%

                              SILK         22         to     24%

                              GOLD    0.59        to   0.60%

                              COPPER   20        to     22%



RAW MATERIALS

The required raw materials for the production of the gold zari are:-

Ø      Silver wire        -  76 to 77%

Ø      Silk                   -   13 X 15 denier

Ø      Gold                 -   24 carat.




The information below talks about the XRF technique

XRF (X-ray fluorescence) is a non-destructive analytical technique used to determine the elemental composition of materials. XRF analyzers determine the chemistry of a sample by measuring the fluorescent (or secondary) X-ray emitted from a sample when it is excited by a primary X-ray source. Each of the elements present in a sample produces a set of characteristic fluorescent X-rays (“a fingerprint”) that is unique for that specific element, which is why XRF spectroscopy is an excellent technology for qualitative and quantitative analysis of material composition.

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