Refers to paper that is thin, such as tissue paper, tracing paper, or delicate sheets used for wrapping or crafts.
薄紙で包んだお菓子は上品に見える。
Sweets wrapped in thin paper look elegant.
薄紙を
Let's proceed little by little, as if peeling off a sheet of thin paper.
薄紙 is thin, delicate paper, the direct opposite of the thick, sturdy paper called 厚紙.
Compound of 薄 (usu, 'thin') + 紙 (kami, 'paper'), with rendaku voicing of kami to gami.