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Why does a soda solution “show through” porcelain?

I can not understand the behavior of a soda solution. How it penetrates the porcelain mug.
The mug is whole, enameled, and the remaining baking soda solution easily passes through the walls.
Maybe there is some explanation for this phenomenon. I searched the network - I did not find anything intelligible.
Why does a soda solution “show through” porcelain?
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20 comments
There may also be surface tension when you drink - the soda solution rises along the walls of the circle in which there are sharp edges (here the solution remains on the walls inside, then flows outward due to surface tension. If the solution changes concentration in the circle overnight, then this is reverse osmosis if it doesn’t change, then it’s microcracks or surface tension
Author
I just leave the mug with the unfinished mortar on the table overnight.
My fantasies on a given topic:
1. Water is just water, a soda solution is an electrolyte;
2. Ceramics with a very high interference can be called a separator;
3. What serves as a stand for the container?
There is one more explanation, if it is not microcracks in the cup, although they are more likely, check the solution in the cup whether it becomes less concentrated (possible by a hydrometer) than before pouring into the cup and if the solution volume decreases. In this case, this is the effect of osmosis, the outside of the mug is humid or it is standing on a wet towel. Mug as a semi-permeable membrane between soda and a moist environment
Quote: gerii
I do not know whose circles

Look at the stigma.
gerii,
So I leave for the night and leave. Gargled, the rest in the mug until the morning.
Author
And you leave the rest of the solution overnight, and look in the morning.
With a disease of the throat, I rinse the soda all the time, though I drip 3 more drops of iodine, and never once did the soda through the walls of the mug.
Author
Humor is not appropriate.
Sorry Zadornov died. He would write to you "what difference does soda solution pass to you or not" -)))
Author
Yes, I don’t know whose circles, circles like circles. Water is not passed, and the solution "prolazit". Some kind of mysticism.
Quote: gerii
Maybe the ceramics are now somehow different?

Or maybe you have such a soda? )))
And why are the welds checked for leaks with kerosene, and not with a solution of soda? ;)
Judging by the photographs, there is some kind of manufacturing defect: if the ceramics were the cause, the release would be uniform over the entire surface, and here is the obvious seepage along the seams or microcracks.
Do you have all the circles of the Polonsky Plant (Coral)?
Author
I recommend everyone to try at home. Today I left the solution at the bottom in a new circle - the same finale.
Maybe the ceramics are now somehow different?
And it would be complete if it was kerosene or some kind of solvent, which all of my plastic containers evaporated, but for a soda solution to migrate through ceramics, this is fantastic ...
water evaporates immediately. Try this crank with salt water. In addition to porosity, only occultism remains))
Author
It comes out on enamel, and the bottom is dry. If porous porous water would also appear.
Author
I tried on two more normal circles, the result is the same. And you try on your own. All circles with cracks cannot. And most importantly, water does not leak, but the solution passes.
Two questions: other solutions pass through this mug and soda solution through a mug of another manufacturer?
Once the Chinese emperor gathered 100 wise men and asked them a question: “Why, if you lower a copper coin into a jug filled to the brim, water pours out, and if gold - does not pour out of a jug?" ...
99 sages gave 99 different explanations ... From the surface tension and fat at the edges of the jug to the magic of gold and the interaction of gold with water ...
... And the latter just took and lowered the coin into the jug ...
... WATER Poured !!! ...
smiles
I think porcelain is porous, soda on your mug appears most of all on the bottom, where the cup rubs and is not covered with glaze. And there is probably a crack on the side that may not be visible to the eye.

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