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Color attributes (a), radar charts of taste intensities (b) for congou black tea infusion produced by different rolling pressures. The total tea pigments contents of TFs, TBs, and TRs, and the index of (10 TFs + TRs)/TBs (c), four major components of TFs (d) in black tea samples treated with different rolling pressures. Different letters indicate significant differences between two groups (p < 0.05).
