# The Plastic Materials and Articles in Contact with Food Regulations 1998, Paragraph 4


The fatty food simulants referred to in the Table are—
(a) corn oil with standardised specifications;
(b) sunflower oil the characteristics of which are—
Iodine value (Wijs) = 120 to 145
Refractive index at 20°C = 1.474 to 1.476
Saponification number = 188 to 193
Relative density at 20°C = 0.918 to 0.925
Unsaponifiable matter = 0.5% to 1.5%; and
(c) a synthetic mixture of triglycerides the composition of which is as follows—
(i) fatty acid distribution
No. of C-atoms in fatty acid residue
6
8
10
12
14
16
18
others
GLC area (%)
∼1
6–9
8–11
45–52
12–15
8–10
8–12
<=1
(ii) purity
Content of monoglycerides (enzymatically)
<=0.2%
Content of diglycerides (enzymatically)
<=2.0%
Unsaponifiable matter
<=0.2%
Iodine value (Wijs)
<=0.1%
Acid value
<=0.1%
Water content (K. Fischer)
<=0.1%
Melting point
28 ± 2°C
(iii) typical absorption spectrum (thickness of layer: d = 1 cm; Reference: water at 35°C)
Wavelength (nm)
290
310
330
350
370
390
430
470
510
Transmittance (%)
∼2
∼15
∼37
∼64
∼80
∼88
∼95
∼97
∼98
At least 10% light transmittance at 310 nm

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Source: https://www.legislation.gov.uk/uksi/1998/1376/schedule/4/part/II/paragraph/4 (the official version)
Page: https://openlegislation.uk/plastic-materials-and-articles-in-contact-with-food-regulations-1998/schedule-4/part-II/paragraph-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.