Product Overview

The KR‑428 Bekk‑style smoothness analyser measures surface smooth‑level for paper and paperboard following classic Bekk air‑leakage principle. Under fixed clamping pressure, it records the time taken for air to seep between specimen and polished glass plane; the time reading (Bekk seconds) reflects how smooth the paper surface is.

This desktop lab instrument strictly meets ISO 5627 and GB/T 456 specifications. It supports single‑side and two‑sided differential comparison measurement, equipped with large‑volume / small‑volume vacuum‑container switching for samples of different smooth‑grade. Widely used within pulp‑and‑paper mills, printing enterprises, packaging factories, R&D centres and accredited third‑party material‑testing labs for raw‑material inspection, printability assessment and finished‑paper quality grading.

Core Product Competitive Advantages

1. Optimised Cam‑Spring Automatic Loading Mechanism Synchronous motor‑driven cam‑spring assembly automatically applies standard 100 kPa contact pressure onto specimens. It removes manual weight‑loading operations, lowers human‑caused measuring deviation and ensures consistent clamping force across every test cycle.
2. Multilingual Large‑Screen LCD Operating Interface Large‑size display supports Chinese‑English bilingual menus. Real‑time presentation of vacuum status, timing count and group‑statistical outcomes. Intuitive keypad layout simplifies parameter setup for new operators.
3. Dual‑Volume Vacuum‑Chamber & Fast‑Measurement Mode Two interchangeable vacuum‑container sizes: large‑volume 380 ml and small‑volume 38 ml. Small‑cavity mode shortens test duration to roughly one‑tenth of large‑cavity cycle. Auto‑range mode completes full measurement within 200 seconds, greatly boosting throughput for high‑volume QC sampling. It also enables two‑face‑difference calculation for front‑and‑back surface comparison of identical paper sample batches.
4. Imported Oil‑Free Vacuum Pump & Excellent Sealing Performance Adopts maintenance‑free imported oil‑free vacuum pump, no regular oil‑adding work required. Premium vacuum‑sealant and mature sealing craftsmanship stabilise vacuum‑chamber tightness, avoiding leakage‑induced distorted test data.
5. Comprehensive Data‑Processing & Expandable Communication Built‑in memory stores batches of historical test records. Integrated thermal printer outputs hard‑copy inspection slips. When paired with matching PC software via USB connection, users can export datasets to computer for further sorting,

Complete Technical Parameter Table

表格

Standard Complete Test Operating Workflow

1. Pre‑Test Preparation Set instrument on horizontal stable lab bench. Power‑on and finish system self‑check. Cut paper specimens into standard dimensions and condition samples under specified temperature‑humidity environment as per standard requirements. Select measuring gear, chamber‑volume and single‑side / two‑side‑difference test mode via front‑panel keypad.
2. Specimen Installation Place conditioned paper sample flat onto polished glass test‑surface, ensure test‑surface faces glass plane without wrinkles or dust contamination.
3. Automatic Smoothness‑Measurement Start test cycle. Equipment automatically applies standard clamping pressure, builds target vacuum level and records air‑leakage time. Upon finishing measurement, cross‑head lifts automatically. For two‑side‑difference test, flip specimen and repeat measurement on reverse side.
4. Data Review & Report Output Read Bekk‑second smoothness result on‑screen. Complete multi‑specimen batch‑testing to obtain average and deviation statistics. Print test report with built‑in thermal printer or transfer data to PC for archiving.
5. Post‑Test Tidying Remove measured specimen. Keep glass test‑surface free of paper dust and fibre residues. Shut‑down power supply after finishing all sample batches. Carry‑out periodic sealing‑performance and timing‑accuracy calibration.

Wide Industrial Application Scenarios

Pulp‑Paper Manufacturing Plants

Smooth‑property QC for coated paper, offset printing‑paper, writing‑paper and packaging base‑paper; evaluate surface printability for factory‑release acceptance.

Printing & Publishing Enterprises

Raw‑paper incoming‑batch inspection; predict printing‑dot transfer quality for books, magazines and commercial printed‑matters.

Packaging‑Material Production Workshops

Surface‑smoothness assessment for carton‑board and decorative packaging‑paper.

Paper‑Material R&D Laboratories

Performance comparison for new pulp‑formula paper grades; analyse influences of calendaring and surface‑coating processes.

Third‑Party Accredited‑Testing‑Organizations

Carry‑out ISO 5627 / GB/T 456‑compliant smoothness‑evaluation and issue formal inspection‑documents for product‑certification audits.

Standard Factory‑Full‑Delivery Kit

1. KR‑428 Bekk‑method paper‑smoothness‑tester main‑unit
2. Built‑in thermal printer together with initial roll of printer paper
3. Power‑supply cable
4. Multilingual printed‑operation‑manual complying with ISO 5627 & GB/T 456
5. Factory‑issued performance‑inspection‑certificate

Optional accessory: dedicated PC data‑processing software and USB communication cable.

Global Distributor & After‑Sales‑Support

We provide remote‑one‑on‑one operational guidance covering gear‑selection, two‑face‑difference test setup and routine sealing‑part maintenance. Spare‑parts stock includes vacuum‑pump assemblies, sealing components and printer consumables. Bulk‑order customers can request custom‑voltage variants for overseas‑market deployment. Regional‑exclusive‑agent privileges contain priority‑production‑scheduling, OEM private‑branding‑services and complete‑set high‑definition product‑marketing‑image‑resources.

Product‑Banner‑Marketing‑Slogan

KR‑428 Bekk‑Method Paper‑Board Smoothness Tester | Air‑Leakage‑Principle Instrument For Paper‑Surface‑Smoothness‑Testing, Complies ISO5627‑GB/T456

Core‑Feature‑Labels‑For‑Product‑Images

Cam‑Spring Auto‑Loading | Large‑Small Dual‑Vacuum‑Chamber | Two‑Face‑Difference Calculation | Oil‑Free Imported Vacuum‑Pump | Chinese‑English LCD UI | On‑Board Thermal‑Printer | USB PC‑Data‑Export | ISO‑GB‑Standard‑Compliant

Safety‑Operation‑Reminder

Keep polished glass measuring surface clean and scratch‑free; avoid hard‑object collision. Do not disassemble vacuum‑system components without professional guidance. Execute periodic instrument calibration to guarantee measuring‑data credibility.