From the Rotline: Is ink bad for my worms?
Question: May I add shredded mail and computer paper to my worm and garden compost bins? Are the inks toxic?
Answer: That is a frequently asked question, thanks for bringing it to the blog! The inks used today in newspapers, boxes etc. are non-toxic and are readily broken down through composting. However, the see-through address windows in the envelopes don’t break down and will remain in the finished compost. One can tear out the window or instead put that type of envelope in the recycling. Also, thick, glossy, colored paper doesn’t break up or decompose easily. Don’t forget to add shredded cardboard and egg cartons, it is a favorite worm food and will disappear quickly.