Ok so does that mean your shudei is no longer porous if you fired it at a high temp and it no longer weeps? due to the high heat and the silicaBaisao wrote: ↑Mon Dec 03, 2018 7:47 pmThere are many factors at play. For example, if the shudei teapot had been fired at a higher temperature, it might no longer weep. The silica and other components of the clay might vitrify in such a way that it could not weep. It is stoneware, but it is possible that it could change its internal structure under a higher temperature.Trusar wrote: ↑Mon Dec 03, 2018 3:46 pmok according to YS website:
- "this clay contains very high amount of iron oxide"
- "The finer the clay used the more sheen the pot has"
- "The clay is highly porous but without allowing water to escape or soak in deeply."
you said your teapot, sweats out the water from the inside to the outside. so far this is the best description for a fully porous clay pot. half porous would probably just be muting without sweating because is gets absorbed from the inside but doesn't quite get as far as the outside.
According to YS the water doesn't soak in deeply or escape (dont know what they mean by escape). so then how is exactly is it highly porous? (if you know). if anything there saying its highly porous, but giving a reason as to why its not highly porous.
maybe the iron oxide somehow plays a factor.
the YS pot i have does not sweat or mute. the most it does is have react with some teas.
The point of the shudei example was to show a glossy pot, with a smooth finish, that is nevertheless extremely porous.
I think that there are many variables involved that makes it difficult to make an absolute from a generalization. As we’ve been discussing the affect of porosity on tea, we have not discussed the one generalization all of my teachers have said is the reason CZ teapots affect tea: they are wheel thrown rather than slab built!
I have no way to prove my teachers are correct about this but they would tell me, consistently, to add an extra gram of tea to a CZ teapot compared to a F1 hongni teapot of the same size.
I know this muddies things. I am sorry. But it should show you that there are many things going on here, and some of them are just passed along generalizations.
Cheers!
your teachers???
what do you study?
i will read up on clay particle size relationship to porosity when im off on friday, or sunday, and comment later. cant be bothered right now.