BS ISO 3688:2022
Pulps. Preparation of laboratory sheets for the measurement of optical properties
- Standard No.
- BS ISO 3688:2022
- Release Date
- 2022
- Published By
- British Standards Institution (BSI)
- Latest
- BS ISO 3688:2022
- Scope
- 1 Scope This document specifies two procedures for the preparation of laboratory sheets prior to measuring optical properties. One is the preparation of pads in a Büchner funnel using a filter paper or a wire screen and the other one is the preparation of laboratory sheets in a standard sheet former (conventional or Rapid Köthen). This document is applicable to all wood pulps and to most other types of pulp. It is not applicable to pulps with very long fibres, such as those made from unshortened cotton, flax and similar materials, unless they are reduced to a suitable fibre length (about 2 mm) before performing the methods. It is not applicable to recycled pulps (see ISO 21993). It is not applicable to opacity measurements or to the determination of light scattering and absorption coefficients.
BS ISO 3688:2022 history
- 2022 BS ISO 3688:2022 Pulps. Preparation of laboratory sheets for the measurement of optical properties
- 2000 BS ISO 3688:2000 Pulps - Preparation of laboratory sheets for the measurement of diffuse blue reflectance factor (ISO brightness)
- 2000 BS ISO 3688:1999 Pulps - Preparation of laboratory sheets for the measurement of diffuse blue reflectance factor (ISO brightness)
