.097 mm
Help for consistently feeding double-sided, heavy, or thick papers in your printer. Please note that inkjet printers (even the same models) are not all the same. One may feed better than another. Don't expect every printer you buy to perform the same.  If your paper is between 12 - 15 mil thick, set Paper Thickess to 4. For papers 16 mil and thicker set Paper Thickness to 5. Consult the paper's handling guide if available for specific advice.  1 The weight of one ream of paper (500 sheets) when cut to the industry standard for that specific grade of paper. 2  Bristols. 3  Solid or laminated heavy-weight printing paper made to a thickness of .006 or higher. 1 A high bulk paper is thicker but less compact than a low-bulk paper of the same weight and size. 2  Calendering. 3  Part of the paper manufacturing process where the paper web passes between polished metal rolls. 4  This increases the paper's smoothness and provides a uniform thickness (caliper). Basis Weight The weight of one ream of paper (500 sheets) when cut to the industry standard for that specific grade of paper. Bristols Solid or laminated heavy-weight printing paper made to a thickness of .006 or higher. Bristols are often used for printed items that require repeated handling. 1 A high bulk paper is thicker but less compact than a low-bulk paper of the same weight and size. 2  Calendering. 3  Part of the paper manufacturing process where the paper web passes between polished metal rolls. 4  This increases the paper's smoothness and provides a uniform thickness (caliper). Although as I have already mentioned there are various types of paper, the average thickness of a regular copy paper ranges from 0.05 to 0.10 millimeters. It's obviously much thinner than the old fashioned papyrus and way more lighter than clay. Its fibers were turned into paper, but it was far from the paper we use today. Paper today, doesn't only vary in its texture, size and color, but also in its caliper or in the other words thickness of a piece of paper expressed in thousandth of an inch. Paper Thickness (Caliper) Chart. The tables below show the approximate caliper (or thickness) for a single sheet of paper of various grades and basis weights. Caliper is expressed in thousandths of an inch (or in some cases, as much as hundred thousands of an inch). With these tables you can quickly look up the caliper for the following kinds of paper: Paper density is its mass per unit volume. ISO 534:2011, Paper and board — Determination of thickness, density and specific volume, indicates it is expressed in grams per cubic centimeter. The density can be calculated by dividing the grammage of paper by its caliper. 
http://www.redrivercatalog.com/infocenter/tips/tip-for-feeding-heavy-thick-double-sided-inkjet-papers.html http://www.redrivercatalog.com/infocenter/tips/inkjet-printer-paper-thickness-platen-gap-adjustment.html http://www.paper-paper.com/weight.html http://www.paper-paper.com/weight.html http://hypertextbook.com/facts/2001/JuliaSherlis.shtml http://www.casepaper.com/resources/calculators/paper-thickness-caliper/ https://en.wikipedia.org/wiki/Paper_density
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