• The ink should have a pH value shall be between 4.0 and 10.0 when tested in accordance with EN ISO 787-9

For all substances that are subject to more than one defined concentration limit, the strictest limit (smallest concentration) applies. For the referred Regulation (EC) 1907/2006 [REACH], Part 3 of Annex VI to Regulation (EC) 1272/2008 [harmonized substances, CLP] and Annex of Regulation (EU) 231/2012 [specifications for food additives], the respective amended versions are binding.