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How do I measure a paper tube or paper core? Paper tubes and paper cores have 4 parts: 1. Inside diameter2. Wall thickness3. Outside diameter4. LengthDiameterDefinition: a straight line passing from side to side through the center of a body or f What's a "star crimped" carpet core insert? The "star crimped" carpet core insert is a unique end closure designed for carpet manufacturers. Finished rolls of carpet used to get bagged and tied off at each end. The "star crimped" carpet core in What's the difference between flexographic printing and lithographic printing? Flexographic Printing – This is the most basic and cost effective method of printing on paper tubes and edge protectors. It utilizes water-based inks that are transferred directly onto the paper