Thank you namnhi for asking! It is design element of the traditional style of many Asian antique and contemporary pots. However, yes you're right it makes it somewhat difficult but having the correct tools such as a slim repotting 'knife' is something most advanced bonsai aficionados simply take for granted. The wall thickness of a fine bonsai container should reduce as it approaches the bottom, at that point a 'bead' is formed and feathered in by hand at the junction of wall/floor creating a fillet and a degree of strength. (How do I know this? I've broken some very very fine old Japanese pots...by mistake)I noticed all your pots have the lip well inside the inner walls. Is there a reason for that.... I thought that would be bad at repotting time since it would be harder to get the tree out.
Thank you for the education on pot construction.Thank you namnhi for asking! It is design element of the traditional style of many Asian antique and contemporary pots. However, yes you're right it makes it somewhat difficult but having the correct tools such as a slim repotting 'knife' is something most advanced bonsai aficionados simply take for granted. The wall thickness of a fine bonsai container should reduce as it approaches the bottom, at that point a 'bead' is formed and feathered in by hand at the junction of wall/floor creating a fillet and a degree of strength. (How do I know this? I've broken some very very fine old Japanese pots...by mistake)
On the esthetic side, the appearance of a thicker wall is the answer. It gives the overall form some balance to the surface area of the walls. Simple design....ages old. Makes a fine pot nice and lightweight....