What is that clear-ish paper called ?

where you can kind of see behind it even writing on it. It is used for invitations????What is that clear-ish paper called ?
Vellum PaperWhat is that clear-ish paper called ?
';Draft Paper'; or ';Sketch Paper'; or ';Tracing Paper';, I think you are referring to. They are almost all the same just different names.
Vellum paper (sometimes called parchment paper).