If aiming for sun tea strength in the shade, how much longer might the ambient temperature steep require?

Answer

Significantly more time, potentially requiring an entire day or overnight steeping.

The fundamental difference between brewing tea in the sun versus in the shade lies in the heat source. Direct sunlight actively warms the water into the upper part of the danger zone, accelerating the extraction process. When brewing solely based on ambient air temperature (shade steep), the water temperature remains much lower, closer to room temperature, leading to a drastically reduced rate of flavor compound extraction. This slower kinetic process means that achieving the desired strength attained in a few hours under the sun might necessitate leaving the tea out for an entire day or letting it steep overnight, assuming the ambient temperature is not exceedingly warm.

If aiming for sun tea strength in the shade, how much longer might the ambient temperature steep require?
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