Which brewing technique is superior for achieving the absolute highest concentration of total dissolved solids, including caffeine and bitterness?
The traditional hot brew method using near-boiling water.
The traditional hot brew method consistently achieves the highest concentration of dissolved solids because heat acts as an incredibly efficient solvent. The high kinetic energy associated with water temperatures near boiling, around 212°F or 100°C, rapidly breaks down the cellular structure of the tea leaves. This energetic process quickly releases a vast array of compounds, including tannins, polyphenols, catechins, caffeine, and flavor compounds, into the water within just a few minutes. While sun tea benefits from extended exposure, its significantly lower ambient temperature limits its extraction efficiency for these key flavor elements and solids. Therefore, when comparing the physics of heat transfer and solubility, the rapid, high-heat process of hot brewing remains superior for maximizing the total mass of solids extracted from the leaves.
