What is this : "sulfuric acid paper" ??? (taobao)

[sorin]

http://item.taobao.com/item.htm?id=9446976067


http://translate.google.com/translate?sl=auto&tl=en&u=http%3A%2F%2Fitem.taobao.com%2Fitem.htm%3Fspm%3D2013.1.0.142%26id%3D9446976067

[SeanB]

I think they mean acid free paper......... Chinglish at it's best.

[niki19851123]

http://item.taobao.com/item.htm?id=9446976067

what the information for the website?taobao is a china website.http://translate.google.com/translate?sl=auto&tl=en&u=http%3A%2F%2Fitem.taobao.com%2Fitem.htm%3Fspm%3D2013.1.0.142%26id%3D9446976067

[sorin]

If is english I can search in the Net by myself, and no need to post here!!!

[hlavac]

I think that means Tracing paper. Immersing paper in sulfuric acid makes it semi transparent, that is how tracing paper is made.
I use tracing paper to print pcb patterns for photo transfer - toner sticks to it much better than the PET transparencies I was using before.

[westfw]

http://en.wikipedia.org/wiki/Tracing_paper
(and I thought it was due to Alkali processing, but that seems to be more of a true (skin-based) vellum thing.)