Paper Tube and Core Buyer Guides
Spec smarter. Every guide ends with a human who can quote it.
Buyer guides written from the winder floor, not a marketing office. How to spec crush strength before cores fail on the machine, how to read ID, OD, and wall thickness, how to choose mailing tube diameters, when a 3″ core beats a 6″, how to qualify a backup supplier before you need one, and what paper push-up tubes do that plastic can’t. Each guide is written for the person who has to put numbers on a purchase order — purchasing managers, converters, and engineers — with the specs, tolerances, and failure modes that actually decide whether a core runs clean.
Core Crush Strength
Radial vs axial crush, what actually causes core failure, and how to spec a paper core against …
View →ID / OD / Wall Chart
The spec-anchor chart for paper cores: common inside diameters, wall thicknesses, and resulting…
View →Mailing Tube Size Chart
Common mailing tube sizes with use cases, plus how USPS and UPS dimensional rules apply to tube…
View →Slitting Core Guide
A converter checklist for slitting and rewinding cores: ID tolerance, wall spec, edge quality, …
View →3" vs 6" Cores
When a 3-inch core is right, when 6-inch earns its cost, and how to run a mixed fleet without c…
View →Backup Supplier Strategy
Single-sourcing paper cores is a silent line-down risk. How converters build a second-source pr…
View →Paper vs Plastic Push-Up
Sustainability, filling-line behavior, consumer perception, and cost: an honest comparison of p…
View →Local Supply = Uptime
Transit-time math for paper cores: what 1–2 day regional freight does to safety stock, emergenc…
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