Modern Doucai porcelain teacups health risks

[mhegara]

Hi everyone!
I've recently purchased a couple of teacups from xianyu, from a highly rated seller. The teacups are made in jingdezhen by a renowned studio "玖芝山房" (at least I think it is renowned based on my research and the high price of his work). the cup were listed for 4000cny and 3700 cny.
As I was blinded by the will of purchasing them, grasped by their artistic beauty, I overlooked the possible problems coming from the enamel painted surface (regarding heavy metals like lead and cadmium): one of them has the inside of the cup painted as well (where hot tea will be in contact with), while the one with cranes has plane white porcelain inside. I've contacted the seller through superbuy, asking for certificates that in some way can prove the safety of the cups, but his answer has only been "暴德镇窑口都没有这个的; 放心都是用原矿釉的": practically saying "trust me, they only use genuine enamel".
So my questions would be:
- Does anyone know the studio and can somewhat testify for the safety of their materials?
- in general, is it highly concerning to use modern doucai porcelain as my teacups if tea come in contact with the painted enamel?
- What can you advise to ease my concerns ?(chat gpt suggest to do an XRF analysis, but I'm unsure about the cost, its effectiveness and the possibility that the lab could damage my items). I'm delighted with my purchase but I mainly took them to use them: it would pretty dramatic for me to have to display them only!

Hopefully someone can come to the rescue. Thanks a lot for your invaluable help!!

[pedant]

hey

- Does anyone know the studio and can somewhat testify for the safety of their materials?

no

- in general, is it highly concerning to use modern doucai porcelain as my teacups if tea come in contact with the painted enamel?

no

- What can you advise to ease my concerns ?(chat gpt suggest to do an XRF analysis, but I'm unsure about the cost, its effectiveness and the possibility that the lab could damage my items). I'm delighted with my purchase but I mainly took them to use them: it would pretty dramatic for me to have to display them only!

at this price point (which imo is probably inflated, but that's the western-facing market for you), and given the artistry, i am inclined to 'just trust them, bro'.
however, check this out this reagent for lead detection:
viewtopic.php?f=32&t=2789
i'd apply it directly on the outside of the cup. you could also try leaching out some lead with 5%+ AcOH (white vinegar) in the cup for a few days with cling film over it, decanting into a watch glass, and testing that residue after complete evaporation with the aforementioned reagent.

Hopefully someone can come to the rescue. Thanks a lot for your invaluable help!!

np. nice looking cups, btw. what's the volume?

[mhegara]

Thanks a lot for your answer!!
actually I bought them from xianyu, not a western facing market but strictly a Chinese one, so the price was actually the one they were being sold in china. I did however succeed in having a discount from the seller for purchasing both.
It did occur to me the information regarding that discussion while roaming trough the forum. I think it is a little bit difficult to let the test work for me (buying all the materials and succeeding in the tests) but it's a path nonetheless. Anyhow, lot of people helped me come to reason to the fact that probably it's overthinking too much, and I've reached too the conclusion that maybe I don't care very much if there is possible lead leakage or not: i really want to use them, and with proper attention and maybe without using them too often I can minimise every possible risk.

[mhegara]

np. nice looking cups, btw. what's the volume?

approximately 90ml both!

[pedant]

I've reached too the conclusion that maybe I don't care very much if there is possible lead leakage or not: i really want to use them, and with proper attention and maybe without using them too often I can minimise every possible risk.

how about intentionally leaching out hypothetical surface contaminants? put the cups in a lidded jar and submerge them in like 500mL 5% AcOH (standard strength household white vinegar) for a week?

that should reduce the amount of stuff near the glaze surface that could leach out into your tea.

for sure i would use them. they're nice cups.