ISO 12507:2025

International
Standard
ISO 12507
First edition
Paper and pulp — Deinkability test
2025-02
for printed paper product mixtures
containing woodfree printed paper
Papier et carton — Essai de désencrabilité de mélanges de produits
en papier imprimés contenant du papier imprimé sans bois
Reference number
© ISO 2025
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Published in Switzerland
ii
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Equipment . 3
5.1 General equipment .3
5.2 Equipment for preparation and flotation .3
5.3 Equipment for specimen preparation .3
5.4 Equipment for analysis .4
6 Chemicals . 4
7 Procedure . 5
7.1 General .5
7.2 Sampling and sample preparation .6
7.2.1 General .6
7.2.2 Identification .7
7.2.3 Non-paper material/loose and glued inserts/insertions .7
7.2.4 Adhesive applications .7
7.2.5 Accelerated ageing .7
7.2.6 Breaking up of samples .7
7.2.7 Measurement of moisture .8
7.2.8 Measurement of ash content .8
7.2.9 Determination of the required amount of sample .8
7.3 Preparation of dilution water and chemicals .8
7.3.1 General .8
7.3.2 Preparation of dilution water .8
7.3.3 Preparation of chemicals .9
7.4 Pulp preparation .10
7.4.1 Pulping .10
7.4.2 pH requirement .10
7.4.3 Storage .11
7.4.4 Dilution . 12
7.5 Flotation . 12
7.6 Yield . 12
8 Specimen preparation . .13
8.1 General . 13
8.2 Filter pads . 13
8.3 Membrane filters .14
8.4 Handsheets .14
9 Analysis . .15
9.1 General . 15
9.2 Reflectance measurements . 15
9.2.1 General . 15
9.2.2 Reflectance factors . 15
9.3 Filtrate darkening . 15
9.4 Dirt particle measurement . 15
9.4.1 Scanner . 15
9.4.2 Procedure for dirt particle measurement .16
10 Test report .16

iii
Annex A (normative) Pulping devices .18
Annex B (informative) Examples of flotation cells . 19
Annex C (normative) Testing the filtration time of filter papers .20
Annex D (informative) Testing the pH of smaller sample amount .21
Annex E (normative) Threshold value determination and size classification .22
Bibliography .23

iv
Foreword
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