The ceiling rose is white, the cord is yellowed, and has been ever since I moved in 9 years ago.
The condition of my lungs is irrelevant to this thread.
Several air cleaning machines operating in my lounge have prevented the yellowing of my ceiling which I painted 3 or 4 years ago.
Since you show concern for my health, I assure you that I do not inhale deeply and an xray 3 years ago showed only 'slight damage' and all other organs are in good nick.
Thank you for your concern
