Figure 10 Comparison of L150 Jameson cell mass pull versus recovery curve with 3-stage dilution and 2025 baseline rougher tests. VANCOUVER, British Columbia, Sept. 04, 2025 (GLOBE NEWSWIRE) -- Highland Copper Company Inc. (TSXV: HI; OTCQB: HDRSF) (“Highland” or the “Company”) is pleased to announce positive results from its 2025 metallurgical test work program for the 100%-owned Copperwood Project (“Copperwood”), located in Michigan’s Upper Peninsula. The test work was conducted by Base Metallurgical La ...