Rock Tech Lithium Advances Georgia Lake Lithium Project, Identifies Potential Pathway to Reduce Processing CAPEX by Up to 50 per cent

About this update from Rock Tech Lithium Inc.

Optical sorting test works, co-financed through Ontario Critical Minerals Innovation Fund, identifies a potential pathway to improve project efficiency and lower capital and operating costs Key program highlights include: Ontario's Critical Minerals Processing Fund ("CMIF") helped demonstrate potential to unlock real value at the Georgia Lake Project. Collaboration with Queen's University and STARK Resources demonstrated the effectiveness of government, industry, and research partnership. Ore-sorting test work removed approximately 25 to 45 per cent of waste material before downstream processing. 1 The upgraded material stream improved ore quality by approximately 1.4x to 1.8x1. Early engineering work identified a potential pathway to materially reduce future crushing and concentrator capital costs by up to 50 per cent1. The Georgia Lake Project further supports Rock Tech's broader Ontario mine-to-converter strategy alongside the planned Red Rock Converter. 1  Based on preliminary test work on representative Georgia Lake material and subject to further engineering, validation and integration into future technical studies. TORONTO, May 19, 2026 /CNW/ - Rock Tech Lithium Inc. (TSXV: RCK) (OTCQX: RCKTF) (FWB: RJIB) (WKN: A1XF0V) (the "Company" or "Rock Tech") is pleased to announce the successful completion of its Ontario Critical Minerals Innovation Fund supported ore-sorting program for the Georgia Lake Lithium Project ("the Project") in Northern Ontario. The Project is part of Rock Tech's broader Ontario mine-to-converter strategy and, alongside the planned Red Rock Converter, supports the development of a domestic, made-in-Canada sovereign defence and battery materials supply chain. Completed in partnership with Queen's University and STARK Resources, the ore sorting program evaluated UV Laser-based sorting from Optimum N.V. and X-ray Transmission ("XRT") sensor-based sorting from allmineral Aufbereitungstechnik GmbH & Co. KG for the pre-concentration of mineralized material from the Project (refer to Press Release – Rock Tech Lithium Receives $388,074 in Funding from Ontario's Critical Minerals Innovation Fund, dated June 23, 2025). Test work was conducted on two sample sets: selected drill core used to establish and calibrate sorting algorithms, and a blended surface-derived sample used for small-scale testing. Testing was completed under cont...

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