ISO 21993:2020 pdf download

ISO 21993:2020 pdf download.Paper and pulp — Deinkability test for printed paper products
1 Scope
This document specifies a basic laboratory test method for deinkability, applicable to any kind of printed paper product, under alkaline conditions by means of single stage flotation deinking and fatty acid-based collector chemistry.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 187, Paper, board and pulps — Standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samples
ISO 638, Paper, board and pulps — Determination of dry matter content — Oven-drying method
ISO 1762, Paper, board, pulps and cellulose nanomaterials — Determination of residue (ash content) on ignition at 525 °C
ISO 2469:2014, Paper, board and pulps — Measurement of diffuse radiance factor (diffuse reflectance factor)
ISO 2470-1, Paper, board and pulps — Measurement of diffuse blue reflectance factor — Part 1: Indoor daylight conditions (ISO brightness)
ISO 3689, Paper and board — Determination of bursting strength after immersion in water
ISO 4119:1995, Pulps — Determination of stock concentration
ISO 5269-1, Pulps — Preparation of laboratory sheets for physical testing — Part 1: Conventional sheet-former method
ISO 5269-2, Pulps — Preparation of laboratory sheets for physical testing — Part 2: Rapid-Köthen method
ISO 5631-1, Paper and board — Determination of colour by diffuse reflectance — Part 1: Indoor daylight conditions (C/2 degrees)
ISO 12641-1:2016, Graphic technology — Prepress digital data exchange — Colour targets for input scanner calibration — Part 1: Colour targets for input scanner calibration
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1 deinked pulp
pulp obtained from printed paper products, and deinked according to this document
7.2.8 Measurement of ash content
Determine the ash content of the printed sample according to ISO 1762. Take special care to take a representative portion of the sample if it is comprised of different paper grades with different ash contents, e.g. cover and interior part(s).
7.2.9 Determination of the required amount of sample
The viscosity of a pulp slurry is – among other parameters – dependent on its ash content. Low viscosity due to high ash content can result in insufficient disintegration of the sample. Therefore, the pulping procedure is defined with an oven-dry fibre concentration of 12 %. Consequently, the total amount of the printed sample for the test is not constant but has to be calculated according to its ash content (see 7.2.8) and moisture content (see 7.2.7).