[AlekZ]

Thank you for your nice post. There will be a lot of water in the Vistula before I get enough practice... . Besides, I suspect that not every repair will be successful. You have to take into account that there may be a leak in the anode lead (I've seen such cases) or the glass may break due to stress. I advise everyone not to throw away damaged picture tubes as long as the screen cone with the piece of neck is intact. There may still be a chance for such CRTs. Let's save old picture tubes!
Currently I am working on the topic of phosphor P4 (white). Perhaps I will try to make it myself. Below are some test photos of the various phosphors I have.