What's the root cause precisely for where all this toxic material originates from? How does it get into a factory in the first place? Is it some kind of sabotage or is this stuff inherently in raw materials that require processing that is omitted? How does one find oneself with a bunch of lead in this day and age without seeking it out?
Lead and cadmium are used in paints - lead for white, cadmium for yellow. The west has discontinued them for toxicity reasons, but they're still prevalent in China.
They are added to pigments, that are then mixed into the paints. The company mixing the paints may or may not know those chemicals are in the pigments that they purchase from another supplier.
