Normally, the yixing teapot water flow out effect reach the perfect conditon when areas of holes of spout in the root greater than the area of spout mouth. So whenever dig 7 holes, 9 holes or 14 holes, even more holes, get the right flow out effect. Like the picture above, just 4 holes' area is equal with the area of spout mouth, so in normal use, ensure 4-5 holes not blocked, the water flow out effect is right.
But broken tea, tea dust and big tea leaf may block all the holes in the spout, so when pour, you have to keep shaking the pot to make the tea soup flow out, this is normal phenomenon, you can't say the design of teapot is not good. But oversized hemisphere mesh holes can't solve this problem, in the yixing teapot body, make the flat mesh surface to hemisphere, orginally not more than 0.5cm2 area of mesh, expended by 10 times, in this way, it is hard for holes be blocked by tea leaves or tea dust.
1. First we make a pot of tie guan yin
2. Water flow out smoothly and swiftly
3. Destructive test, add another pack of tie guan yin
4. Tea leaves entirely over loaded in the pot body
5. Entirely over loaded xishi get water flow out smoothly, not be affected by so much tea leaves. In order to show the truth, I specially take away the lid when pour, so the angle of pot is small, even that, you can feel the power of hemisphere mesh holes!
6. Test finished, take a close-up view, still steaming!