Chemists in Italy have proposed a reason why sulfate-rich lead chromate dyes, used widely in paintings, degrade under light. Lead chromate dyes were a staple tool that Vincent van Gogh used widely in ...

Lead chromate, also known as chrome yellow, has been used for centuries as a pigment, but it is highly toxic, containing lead and hexavalent chromium (think Erin Brockovich). Chrome yellow is no ...