one-of-a-kind paintings

[Anonymous]

Dear Sirs,

I am writing to ask the meaning of one-of-a-kind.
Woodblock prints are always one-of-a-kind paintings. Can someone explain this sentence for me?

Thanks!
Yun Ju

 

[Francois]

There are no other paintings like his. They can't be categorized. They are unique.

FRC