Every batch of fully lab-inspected adhesive label cores passes eight key testing items: inner & outer diameter tolerance, end flatness, radial tensile strength, interlayer peel strength, moisture & mildew resistance, abrasion resistance, dust volume and ink adhesion. Stamped bilingual inspection reports are provided to pass customs and third-party re-inspection overseas, meeting strict quality standards of large European & American label groups and multinational importers. An independent QC lab inside the factory equips compression testers, constant temperature & humidity aging chambers and dust meters. Uniform strict testing standards apply to all six tube ranges with 3,000 tons annual supply: cash register paper tubes, adhesive label paper tubes, chemical fiber industrial paper tubes, paper-making industrial paper tubes, film industrial paper tubes and printing industrial paper tubes.
Tear fatigue testing on chemical fiber cores fully meets warehouse re-inspection s…