10 Jun
2025
10 Jun
'25
4:58 a.m.
https://news.st-andrews.ac.uk/archive/new-tool-to-identify-toxic-green-books... In India, we use copper sulphate in native glue or gum paste for book binding work. That is toxic, but we are careless about it. Dr P Vyasamoorthy / 9490804278