WF Substrate Paper Weight vs. Film Thickness

[Stephen Marsh]

I originally posted this in the substrate forum and did not receive any replies. Is this a hint that what I am asking is not realistic due to film/poly/vinyl being so different to paper, or was the question placed in the wrong forum?

Coming from a prepress background, I am used to thinking in paper weight - which is GSM for Australia. In the wide format realm and display graphics, the media (backlit film, vinyl etc) is specified in thickness of MIL or 1/1000 of an inch.

Does anybody have a relative conversion chart/table or formula/spreadsheet for approx. conversions from MIL thickness into weight? I understand that this would be specific to certain media and the same thickness would vary differently for say vinyl vs. backlit film at a given sheet size. Ideally the weight would be GSM, however if this is only available to say US weight I can find conversion charts for US to GSM weight.

I have searched for this sort of info and have not had much luck, which is why I am asking here. Thanks in advance.

Stephen Marsh

[tamale]

Not an easy one as fiber density is not known.

Caliper and weight are always dependent on fiber density and that is an unknown factor.

You may want to try the table available at Case Paper and get an approximate result by reverse calculation from the weight to caliper table. It's at:

Paper Thickness Chart | Caliper Tables

Good luck!

Tamale