The test is fairly simple. After cleaning this new tetsubin several times, I boiled water with each of them to compare the taste of their respective hot waters.
This water comes from this lovely shaped tetsubin with copper top. I especially like the curved handle. It looks elegant and provides a better grip.
The outside of the tetsubin is in good shape.
The reason for the yellow color of the water is that it's very rusty inside.
The water tastes soft at first, but quickly develops a strong rusty taste that one can almost smell!
I'm less concerned with the red rust on the bottom than the grey rust above. (The red rust seems active and similar to my other tetsubin, while the grey rust seems dead).
This rust had no negative impact on the taste of the water. The water tasted very soft and clean. Excellent!
|Inside the new tetsubin|
This rough surface requires a good, gentle cleaning with rice water. Then, I boiled several times water in it, until the water that came out looked transparent.
|Bottom of the new tetsubin|
I prefer the pure and soft feel of my regular tetsubin, but this new tetsubin has a better taste than more rusty tetsubin. So, age alone doesn't say much about the quality of the water.
|Refined fixation for the handle|