BS ISO 21993:2020 Paper and pulp — Deinkability test for printed paper products.
7.2 Sampling and sample preparation
7.2.1 General
Take a sample which is representative of the printed material to be tested. The recommended amount of each printed sample is 1 000g. If available, sample also some unprinted material and store separately for additional testing.
7.2.2 Identification
Describe, if possible, full details of each paper in the printed material to be tested. If available, the following shall be included:
a) identification of the printed paper product as to title, publishing company, date of issue, product
b) the print process, printing and drying/curing parameters and press settings;
c) the name and exact identification of inks or toiler and of varnishes (if applicable);
d) any pre- or post-treatment applied (if any);
e) the paper grade, manufacturer and brand name, ash content of the printed paper sample.
Specify whether the printed sample contains inserts and/or supplements.
7.2.3 Non-paper material/loose and glued inserts/insertions
Remove any non-paper material, all inserts, glued-in inserts, stickers, sachets and similar items from the printed sample.
7.2.4 AdhesIve applications
In order to avoid any interference with the test procedure and the results, remove any visible adhesive material — i.e. adhesives used in inserts, stickers, spines and similar — from the printed sample.
7.2.5 Accelerated ageing
Place the printed sample in a drying oven for accelerated ageing at (60 ± 3) °C for 72 h. Individual stacks should not contain more than 20 sheets.
NOTE 1 Accelerated ageing is necessary because the age of printed paper products can influence their deinkability. These accelerated ageing conditions correspond to 3 months to 6 months of natural ageing.
NOTE 2 If the age of the printed product is three months or higher, the accelerated ageing can be omitted. This is to he noted in the report as deviation of the procedure.
7.2.6 Breaking up of samples
Tear the accelerated aged printed sample into pieces of about 2cm x 2cm and allow them to equilibrate in the laboratory environment.
7.2.7 Measurement of moisture
Determine tile moisture content of the air-dry sample by testing a portion according to ISO 638. Based on the results obtained, calculate the appropriate air-dry mass of the printed sample which corresponds to the oven-dry mass prescribed.BS ISO 21993 pdf download.