I’m trying to find the best tracing paper for a reasonable price.

Here’s the only place with big rolls (that I can find):  http://www.craftsetc.com/store/search.aspx?searchTerm=tracing+paper

Do any of those look ok for my FTIR setup?  I want to put it between my silicone and rosco layer.  I would like to get one of the big rolls since my screen is 44” diagonal.

Does it need to be labelled as “transparent”, or would “white” be sufficient if it’s described as being ‘really transparent’?