Page 12 - Bullion World Volume 03 Issue 6 June 2023

Bullion World | Volume 3 | Issue 6 | June 2023

Ms Nishtashri Srinivasan: Ms Nishtashri Srinivasan, ELECTROFORMING PROCESS
Director, Emerald Jewels Industries India Private Limited • A unique feature of the electroforming process is
who was the final speaker in the panel spoke about that the silver grows over the Mandrel atom by atom
the process of electroforming which included the basic and this process imparts absolute accuracy and high
meaning, followed by the briefing of the whole process aspect ratio.
involved in electroforming, and the benefits of using • In Electroforming, thickness ranges from 100 micron
electroforming products. to 600 Micron.
• The solution or bath contains the required silver
The Benefits of metal in the form of Salts.
Electroforming
• The process continues until the required thickness
Products
is achieved by maintaining optimum level of bath
• We can produce jewellery/idols which are large in
contents & operating parameters.
size but light in weight
• Operating the bath is complicated and continuous
• Complex 3D articles can be made employing this
monitoring is required while the silver idol is forming.
technology with high dimensional accuracy.
• Maintenance of chemical parameter is essential to
• Hard and durable statues & jewellery products with
control rejections and ensure surface quality.
0.1-0.6 mm thickness.
• In Silver electroforming we can produce a wide
• Our 15 Years of experience gives us the edge to
variety of products like Idols, Jewellery, Lamps,
produce products of absolutely any thickness
• Garlands, Gift articles etc.
• We make EFM products in both a dull & High Shine
finish with good strength
Questions from the audience-
Mr Abhishek Jain to Mr Ankur Goyal- Is Cadmium
being explored or used in the making of Master-
alloys?
No, it is not used in the making of master alloys as it is
toxic and cancerous in nature which is also banned by
the government of India. We use substitutes like copper
or zinc instead of cadmium.

Mr Kishore Choksi to Mr Ankur Goyal - As stated in
your presentation, one cannot achieve high purity
levels through chemical refining. What do you think
is the reason for this?
In the case of electro-refining the anodes are covered
with an anodic bag which restricts the flow of
impurities, thus giving a higher purity content. But, in
the case of chemical refining the whole manufacturing
Process Flow of Electroforming process should be monitored to obtain a higher purity
• Jigging percentage.
• Cleaning Process :
1. Electrolytic Cleaning
2. Acid Dip Cleaning
• Forming Process :
1.Electroforming Process
• Mandrel Removing or
Emptying process

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