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Roll Specifications
Basis weight, core sizes, roll dimensions, and how to measure and specify paper rolls.
Roll Specifications articles
Why Slit-Width Tolerance Matters for Automated Equipment
Slit-width tolerance defines how closely a finished roll is held to its specified width. Learn why precise width control matters for automated equipment and what dimensions to communicate to your converter.
What Is Paper Caliper? Paper Thickness, Mils, and Why It Matters
Paper caliper is the measured thickness of paper or paperboard. Learn how caliper is expressed in mils and microns, how it differs from basis weight and GSM, and why thickness matters when specifying a paper roll.
Grain Direction: What It Is and When Converting Buyers Should Care
Learn what grain direction means in paper, how machine direction differs from cross direction, and when MD/CD matters for converted-paper specifications.
Paper Slitting Tolerances: What ±1/32″ Means for Your Application
Learn what paper slitting tolerance means, how finished-roll width affects downstream equipment, and how to specify the tolerance your converting job requires.
Basis Weight Explained: What “80 lb Paper” Actually Means
Learn what paper basis weight means, why two 80 lb papers can differ, how basis size affects the number, and what buyers should specify when requesting converting.
Basis Weight vs. GSM: How to Convert Paper Weight
Learn the difference between paper basis weight and GSM, why pound ratings depend on paper category, and how to convert between lb and g/m² accurately.
Paper Roll Core Sizes: Common Inside Diameters and How to Choose
Learn how paper roll core sizes are specified, why inside diameter matters, what to check before choosing a core, and what buyers should include on a converting RFQ.
How to Calculate Linear Footage on a Roll of Paper
Learn how to estimate the linear footage on a paper roll using roll diameter, core diameter, and material caliper, with a worked example and practical buyer guidance.
How to Measure a Paper Roll
A practical guide to measuring paper rolls: width, outside diameter, core inside diameter, and weight — plus the measuring mistakes that derail converting quotes.
More Topics
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Converting Basics
Plain-English guides to slitting, rewinding, and how paper converting actually works.
Quality & Troubleshooting
Diagnosing roll defects, storage and handling, and keeping converted paper running right.
Specialty Papers
How fire resistant paper and steel interleave paper work, and where each is used.
Buying Guides
How to spec an order, write an RFQ, and work with a contract paper converter.
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