From my own research and also lead testing on old porcelain, it is pretty safe to assume that overglaze is to be avoided as it almost always leaks lead. Red in particular. If it were only on the outside you can still use it, as it does not touch liquid or your lips, but as those are on the inside…gatmcm wrote: ↑Sun Mar 25, 2018 12:09 pmThe red marks as well as the gilded ones are over glaze, I'm a bit weary about using it because of them, I am a bit afraid of the paint leaching chemicalsHmm wrote: ↑Sun Mar 25, 2018 10:55 amYeah, the wanyu mark at the bottom supposedly means that it could have been made anywhere from the 1920s to 1970s. I would hedge more on the early half of that because it's hand painted and the flower pattern inside the bowl. Standard PRC era bowls are always printed rather than handpainted. The bowls don't go for too much, but for 2 euros, that's surely a bargain. Are those red shou characters inside overglazed or underglazed?
Edit: after passing my nail over the gilded characters I'm not so sure they are over glaze, it feels smooth, the red characters are definitely over though
I used a 3M lead testing kit, which worked well enough for me to detect some lead. Not 100% fail proof though.