Swasti Cashew Industries
A Crop That Built a Coastline
The cashew nut is not native to India. Brought by the Portuguese to the Konkan coast in the sixteenth century, it took root so thoroughly in South Kanara that it became inseparable from the landscape and economy of coastal Karnataka.
For the first century of its presence in Mangaluru, the cashew was traded raw — kernels with their husks, shipped to European ports. There was no organised processing industry. That changed in the early decades of the twentieth century. And when it changed, it changed everything.
By the 1920s, the first organised processing operations had appeared in Mangaluru. The VITAPACK packing system, introduced around 1925, enabled cashew kernels to be packed in tin containers with carbon dioxide gas — giving them the shelf life that American and European markets required.
The next leap came in the mid-1930s, when two Mangaluru firms independently developed machines for roasting cashewnuts in an oil bath of cashew shell liquid. The oil bath method gave uniform roasting, prevented kernel blackening, and — crucially — extracted the cashew shell liquid as a valuable byproduct.
When Shri Sujir Damodar Nayak began processing in 1941, he adopted the oil bath method. His chemistry training gave him an understanding of CNSL's industrial potential that most processors lacked. The byproduct became, in time, as important as the kernel itself.
Raw cashewnuts arrived from East Africa and coastal Karnataka. At Swasti's peak, the factory compound at Konchady held hundreds of tons before each season's processing began.
The raw nuts passed through the oil bath roaster — the technical heart of the process. Heat caused the shell to crack and the cashew nut shell liquid to be expelled and collected.
Workers cracked open each roasted shell by hand to free the kernel, then peeled away the thin inner skin. Speed and accuracy determined the grade of the finished kernel.
Kernels were graded by size and quality and packed in 25 lb tin containers, two tins to a dealwood case, and transported to the Bunder docks for loading onto vessels bound for New York, London and beyond.
Cashew Nut Shell Liquid is a naturally occurring phenolic compound found in the honeycomb structure of the cashew nut shell. It is one of the few naturally sourced materials that behaves like a synthetic industrial resin — and it has been used as one for over eighty years.
CNSL is extracted during cashew kernel processing. The manufacturers and chemists who understood its industrial value first — and built the expertise to extract, assess and supply it — created an industry within an industry. Swasti Cashew Industries was among them from the beginning.
CNSL-based resins are the standard material for brake liners and clutch facings in automotive and aerospace applications. The heat generated under sudden braking softens CNSL resin rather than hardening it — maintaining grip where a conventional resin surface would fail. This property was recognised as strategically critical during the Second World War and remains a primary application of CNSL globally.
CNSL polymers and condensation products are used as acid-resistant paints, waterproofing compounds, insulating materials and anticorrosive coatings. They are more heat-resistant than most synthetic equivalents and have been in commercial use since the 1940s.
CNSL-modified phenolic resins are used in laminates, foundry applications, and surface coatings. The material's natural origin and performance characteristics have made it increasingly relevant as industries seek bio-based alternatives to purely synthetic compounds.
Printing inks, flooring materials, industrial lubricants, and a range of specialty chemical applications all draw on CNSL's unique phenolic properties. Research into new applications continues globally.
When Shri Sujir Damodar Nayak began extracting CNSL at his Mangaluru factory in the early 1940s, he was operating at the frontier of the industry. His chemistry degree gave him an understanding of CNSL's industrial chemistry that most processors in Mangaluru at the time could not match.
By the late 1950s, Swasti was supplying 400 to 500 tons of CNSL annually to industrial buyers in New York — most of it shipped in bulk tanks in ships' holds. The primary buyer was Irvington Varnish and Insulator Co., New Jersey, who used it for brake liners, insulating varnish and industrial products. European buyers in Genoa were simultaneously developing as a market.
"We are exporting this commodity mostly to U.S.A., where M/s. Irvington Varnish and Insulator Co., New Jersey, are the chief buyers. They use this material for manufacture of brake liners, insulating varnish and other industrial products. In fact, we are shipping 400 to 500 tons of this liquid to New York every year."
— Shri Sujir Damodar Nayak, letter to prospective buyer, 15 October 1958
That depth of engagement with CNSL — in quality assessment, industrial application knowledge, supply chain, and market relationships — is what Swasti brings to the market today. Seven decades is not a claim. It is the record.
We welcome enquiries from industrial users, buyers and industry participants with an interest in CNSL. Please contact us at info@swasticashew.co.in or call +91 99000 03197.