Method
Make the influential conditions visible.
We treat brewing as a system: tea, particle size, dose, water, temperature and time interact. Stating them clearly makes comparison useful.
Particle size × water × time
Five variables we control
Particle size
A 0.71mm sieve boundary separates current cold- and hot-brew specifications.
Dose
Every sachet contains 3g.
Water
About 400ml cold; 250ml hot.
Temperature & time
Refrigerated from about 1h; or 85–95°C for 90–120s.
TDS as an observation—not a taste score
TDS helps compare extraction curves under recorded conditions. It does not measure aroma, balance or personal preference by itself, so the marked point is a recommended extraction point rather than a universal optimum.