I beg for sincere and humble pardon if I stumbled into the "save the lead solder thread". I actually thought this was about silver soldering, but ive been known to make mistakes before so. Not my intention!
I stand by my very bastante suggestion: Dont give lead to kids! If people are worried about corn sugar, plastic softeners, methylphenidate, aluminum salted deodorants. Remember every other toxin IS NOT in competition to these and others. They actually come on top of these, and some toxins even work TOGETHER to make your body miserable. Go figure.
My personal view is that MOST metals in any form is somewhat toxic. With exeption for gold and some other edel-metals, which dont react to acids in palm sweat or wherever you would want to imply it. Of course humans and other beings need trace-metals for physical function. The most famous being iron for the haemoglobin in blood to pick up oxygen. These are only, like the word implies, just trace(amounts). You dont need to drive nails through your hands to be able to breath.
That said! As we speak, im waiting for a nice kg of lead solder shot in the mail to weigh down a recent building project. Lead isnt the best material for this. Gold has a lot higher density, but I found it too expensive. Tungsten is about the same density as gold, but it would be living hell to machine it to size. Uranium-238 aka DU is kind of hard to come by without having special forces raiding my bedroom at 3:13 in the morning.
Lead is everywhere in society. In roofing, batteries, old piping, fishing lures and whatnot. Thankfully they took it out of gasoline(not without protest) so we dont have to breath it when going to the store to buy a pack of cigarettes and a box of multivitamins.
My grandfather died at 70 from lungcancer. He worked alot of demolition, and at the time "Eternite" also known as asbestos was on the menu. Asbesto dust has the form of micro needles which penetrates the lungs and stay there for eternity. Pun intended! He also smoked ten to twenty Ritmeister cigarillos a day.
If you actually read through this post, and can spot a message. Good or bad for you I guess. Maybe this is why average lifespan has almost doubled in modern society. Because we marinate in toxins. I dont care because I feel these questions are somewhat big for me. Im gonna go have a cup of coffe now.
Have a nice day, and dont catch that hot lead comming at ya. That sure is poisinuous