BS ISO 5269-3:2008
Current
The latest, up-to-date edition.
Pulps. Preparation of laboratory sheets for physical testing Conventional and Rapid-Köthen sheet formers using a closed water system
31-10-2008
| Committee |
PAI/11
|
| DevelopmentNote |
Supersedes 07/30162477 DC. (10/2008)
|
| DocumentType |
Standard
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
This part of ISO5269 specifies two procedures for preparing a closed water system which is in retention equilibrium, to be used for the preparation of laboratory sheets from pulps with a high fines content. One procedure is applicable to the preparation of laboratory sheets using the conventional sheet former and the other using the Rapid-Köthen sheet former. The sheets prepared prior to attaining retention equilibrium are discarded.
This part of ISO5269 is especially applicable to mechanical and chemimechanical pulps, as well as to pulps prepared from recycled fibres, i.e. pulps with a high fines content for which retention of fines is poor when using the open water system as described in ISO5269-1 or ISO5269-2. This part of ISO5269 is not applicable to some very long-fibred pulps, such as those from unshortened cotton, flax and similar materials.
After retention equilibrium is attained, the preparation of laboratory sheets for testing the physical properties follows the procedures described in ISO5269-1 (conventional sheet former) or ISO5269-2 (Rapid-Köthen sheet former), whichever is relevant.
This part of ISO5269 is generally not applicable for the preparation of laboratory sheets from chemical pulps for which ISO5269-1 or ISO5269-2 are used.
This part of ISO5269 is not applicable for the preparation of laboratory sheets for measuring ISO brightness. These sheets can be prepared in accordance with ISO3688[3].
NOTE The procedures for forming, pressing and drying are different when using the conventional sheet former and Rapid-Köthen sheet former, see AnnexA.
| Standards | Relationship |
| ISO 5269-3:2008 | Identical |
| ISO 5269-1:2005 | Pulps — Preparation of laboratory sheets for physical testing — Part 1: Conventional sheet-former method |
| ISO 3310-1:2016 | Test sieves Technical requirements and testing Part 1: Test sieves of metal wire cloth |
| ISO 5270:2012 | Pulps — Laboratory sheets — Determination of physical properties |
| ISO 187:1990 | Paper, board and pulps — Standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samples |
| ISO 5263-3:2004 | Pulps — Laboratory wet disintegration — Part 3: Disintegration of mechanical pulps at > 85 degrees C |
| ISO 5263-1:2004 | Pulps — Laboratory wet disintegration — Part 1: Disintegration of chemical pulps |
| ISO 5263-2:2004 | Pulps — Laboratory wet disintegration — Part 2: Disintegration of mechanical pulps at 20 degrees C |
| ISO 3688:1999 | Pulps — Preparation of laboratory sheets for the measurement of diffuse blue reflectance factor (ISO brightness) |
| ISO 5269-2:2004 | Pulps — Preparation of laboratory sheets for physical testing — Part 2: Rapid-Köthen method |
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