Himadri Speciality Chemical Ltd (HSCL) has commenced commercial operations of a 70,000 tonne (t) per annum speciality carbon black line at its Mahistikry manufacturing facility in Hooghly, West Bengal. The company said the brownfield expansion increases its manufacturing capability for advanced carbon materials and supports higher production of premium grades for industrial customers. The development was announced in a corporate release dated 24 February 2026 and reflects the company's strategic growth plans. With this expansion HSCL's total carbon black manufacturing capacity now stands at 250,000 t per annum, including a speciality carbon black capacity of 130,000 t per annum at the Mahistikry site. The scale positions the Mahistikry plant as the world's largest single-location speciality carbon black manufacturing facility and strengthens the company's ability to serve high-value application segments across plastics, inks, paints and coatings. The facility is expected to provide supply reliability and faster market responsiveness for specialised customers. The project incorporates advanced process technologies and state-of-the-art quality control systems to ensure consistent production of premium grades. Energy efficient operations and scalable infrastructure have been integrated to support operational excellence and sustainable manufacturing practices. These measures are designed to enhance product innovation capabilities and deliver performance tailored to niche segments that demand customised carbon solutions. Management indicated the newly commissioned capacity is expected to contribute meaningfully to revenue growth and to strengthen margin profiles over the medium term as global demand shifts towards high performance, customised carbon solutions. Himadri reported operations across domestic and international markets with exports to 56 countries and described a commitment to governance, safety and sustainability that includes eight zero liquid discharge manufacturing facilities and use of in house clean power for 100 per cent of its electrical energy needs. The company also emphasised a continued focus on disciplined expansion, operational discipline and long term value creation for stakeholders.