BS ISO 21896:2020
$142.49
Paper, pulp, and recycling. Decolouration test of dye coloured paper products and paper products printed using dye inks
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 24 |
This document defines a method for measuring the decolouration capability of commercial products, produced using paper and board dyed in mass and/or printed with dye inks.
This document does not apply to paper printed with pigment inks.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 6 | Foreword |
| 7 | Introduction |
| 9 | 1 Scope 2 Normative references 3 Terms and definitions |
| 11 | 4 Symbols and abbreviations 5 Principle 6 Apparatus 6.1 Pulp preparation material 6.2 Reductive bleaching with sodium hydrosulphite 6.3 Oxidative bleaching with hydrogen peroxide 6.4 Preparation of pads |
| 12 | 6.5 Optical measurements 7 Reagents 7.1 Reductive bleaching with sodium hydrosulphite 7.2 Oxidative bleaching with hydrogen peroxide 7.3 Preparation of pads |
| 13 | 8 Sampling 9 Procedure for preparation of pulp for optical measurements 9.1 Pulp preparation 9.2 Bleaching the pulp 9.3 Reductive bleaching with sodium hydrosulphite |
| 14 | 9.4 Oxidative bleaching with hydrogen peroxide 9.4.1 Bleaching conditions 9.4.2 Preparing the bleaching liquor |
| 15 | 9.4.3 Bleaching 10 Procedure for preparation of filter pads |
| 16 | 11 Conditioning of the filter pads for the measurements 12 Optical measurements and calculating the decolouration index 12.1 Measurement conditions 12.2 Measurements 12.3 Calculating the decolouration index |
| 17 | 13 Test Report |
| 18 | Annex A (informative) Sodium hydrosulphite titration |
| 20 | Annex B (informative) Peroxide titration |
| 22 | Bibliography |
