v3.26.1
Summary of significant accounting policies - Schedule of Total Revenues by Product Categories (Details) - Total Revenues [Member] - USD ($)
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Summary of significant accounting policies - Schedule of Total Revenues by Product Categories (Details) [Line Items]    
Total revenue $ 10,265,613 $ 7,722,510
Sales of Pearlescent Pigments [Member]    
Summary of significant accounting policies - Schedule of Total Revenues by Product Categories (Details) [Line Items]    
Total revenue 5,918,673 5,640,808
Sales of Industrial Intermediates [Member]    
Summary of significant accounting policies - Schedule of Total Revenues by Product Categories (Details) [Line Items]    
Total revenue 4,058,772 1,945,522
Sales of Powder Coatings [Member]    
Summary of significant accounting policies - Schedule of Total Revenues by Product Categories (Details) [Line Items]    
Total revenue $ 288,168 $ 136,180