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ring and a 10 kg roller to calculate water absorption (
) by determining the mass difference before and after water exposure, typically 60 seconds.
This video demonstrates how to use a COBB tester to test the water absorption of paper:
Key features and considerations for Chinese-made COBB testers:
- Common Standards: The devices typically conform to international standards such as ISO 535 (water absorption) and TAPPI T441.
- Construction: Most models are made of stainless steel with a quick-release structure for rapid testing, costing generally between $100 and $600 USD.
- Major Types:
- Tilting/Roller Type: Features a rubber roller for standard weight application (usually 10kg) and a cylinder for the water test.
- Automatic/Pneumatic: High-end models feature automatic timing and clamping for better precision.
- Applications: Used in paper mills, quality inspection centers, and packaging research to determine surface sizing, especially for non-bibulous paper like kraft or cardboard.
- Testing Procedure: A sample is cut (), weighed, clamped into the tester, and exposed toof water for 60 seconds (or 180 seconds, based on material).
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Cobb Absorption Test Machine(979)
Alibaba
https://www.alibaba.com › ... › Testing Equipment
Alibaba
https://www.alibaba.com › ... › Testing Equipment
Cobb absorption test machine for cardboard & paper testing, low price starting around $340, minimum order of 1 unit. Verified supplier offers bulk purchase ...
Cobb Tester
Made-in-China.com
https://www.made-in-china.com › hot-china-products
Made-in-China.com
https://www.made-in-china.com › hot-china-products
Apr 7, 2026 — China Cobb Tester wholesale - Select 2026 high quality Cobb Tester products in best price from certified Chinese manufacturers, suppliers, ...
YT-Cobb125 COBB Absorption Tester
Hangzhou Yante Science and Technology Co., Ltd
https://www.yante-tester.com › productshow-115
Hangzhou Yante Science and Technology Co., Ltd
https://www.yante-tester.com › productshow-115
The COBB Absorption Tester is a conventional instrument for the water absorption test ... 152 Haoyun Road, Yuhang District, Hangzhou, Zhejiang P.R.China,311112.Read more
COBB Absorption Tester HD-A509 - Paper Packaging Test ...
Haida test equipment
https://www.haidatestequipment.com › products › cobb...
Haida test equipment
https://www.haidatestequipment.com › products › cobb...
cobb tester is a simple instrument which measures the water absorptiveness of paper, cardboard and corrugated fiberboard under standard conditions.
CHINA NBC-5684 Cobb Absorption Tester
NBchao.Com
https://en1.nbchao.com › ...
NBchao.Com
https://en1.nbchao.com › ...
It is suitable for measuring the water-absorption of various paper or Cardboard surfaces, with a test area of (100 +/- 0.2) cm ², the weight of absorbent paper ...Read more
NT$445.00
PN-COBB Cobb Tester
杭州品享科技有限公司
https://en.pnshar.com › uploads › soft
杭州品享科技有限公司
https://en.pnshar.com › uploads › soft
PDF
Cobb tester is a test of the water absorption capacity of the paper or cardboard surface. Cobb value: Under certain conditions, within a specified period of ...Read more
Cobb & Water Absorption Tester Manufacturer
prestogroup
https://www.prestogroup.com › products › cobb--water...
prestogroup
https://www.prestogroup.com › products › cobb--water...
The instrument is designed to quickly estimate the quantity of water that a paperboard or corrugated board can absorb to its maximum in a given period of time.Read more
RT-411A Paper Cobb Test Machine, Cardboard ...
Dongguan Right Instrument Co., Ltd.
https://dgright.com › product › rt-411a-paper-cobb-test...
Dongguan Right Instrument Co., Ltd.
https://dgright.com › product › rt-411a-paper-cobb-test...
This machine applies to determination of surface water absorption about all kinds of paper or cardboard. But it is not for the accurateevaluation of paper or ...Read more
COBB Cobb Absorption Tester A003A
UTS International Co., Ltd
https://www.utstesters.com › cobb-cobb-absorption-test...
UTS International Co., Ltd
https://www.utstesters.com › cobb-cobb-absorption-test...
A003A COBB Cobb Absorption Tester is to determine the water absorptiveness of sized paper and board, including corrugated fiberboard, under standard conditions.Read more
COBB SIZE TESTER - Precision for Paper & Cardboard
Alibaba.com
https://www.alibaba.com › ... › Testing Equipment
Alibaba.com
https://www.alibaba.com › ... › Testing Equipment
Cobb Sizing Tester With Auto Testing Feature Paper Absorbency Value Tester. $550-600. Min. order: 1 pound. supplier information icon 8 yrs·CN.Read more
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