Study the material before asking it for an answer.
Founded by a mechanical-engineering PhD, CZ Precision Lab applies an experimental mindset to everyday tea: define conditions, record results, and make a useful starting point repeatable.
Why parameter-led tea?
Control what can be controlled
Dose, particle-size range, water, temperature and time are stated clearly.
Keep what makes tea alive
Origin, harvest, water and personal preference still create natural variation.
Make comparison easier
Cold and hot sachets are separated so each mode begins under more suitable conditions.
A practical promise
We do not claim that one number is the only correct answer. We offer a documented starting point, then invite you to adjust one variable at a time.