# The Plastic Materials and Articles in Contact with Food (England) Regulations 2006, Paragraph 4


Where the letter “a” is shown in brackets after the “X”, only one of the two simulants specified shall be used in the migration test, that is to say —
(a) if the pH value of the food is higher than 4.5, simulant A shall be used;
(b) if the pH value of the foodstuff is 4.5 or less, simulant B shall be used.

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Source: https://www.legislation.gov.uk/uksi/2006/1401/schedule/6/part/4/paragraph/4 (the official version)
Page: https://openlegislation.uk/plastic-materials-and-articles-in-contact-with-food-england-regulations-2006/schedule-6/part-4/paragraph-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.