AS NZS 1906.1:2017 Retroreflective materials and devices for road traffic control purposes
3.7.1 General
The sheeting shall be capable of being colour-processed using either compatible transparent or opaque films, roll-coat inks or screen process colours, and graphic printing inks supplied or recommended by the retroreflective sheeting manufacturer for colours defined in Table 3.2 and non-defined colours.
3.7.2 Requirements
When processed in accordance with the recommendations of the manufacturer of the retroreflective material, the films and process colours shall not react adversely with the material and the colour processed material shall conform with the following requirements:
(a) Colour-processed material comprising transparent films or process colours applied to white retroreflective material when new shall conform to the relevant chromaticity coordinates and luminance values given in Tables 3.2 and 3.3 and to a minimum of—
(i) 70% for process colours; or
(ii) 90% for transparent film of the R A values as shown in Table 3.1 for material of corresponding class and colour.
NOTE: If the relevant chromaticity coordinates and luminance value is less than 1.0, this requirement is not applicable.
For non-defined colours, retroreflective performance shall meet the relevant jurisdictional requirements.
(b) The physical properties of any colour processed area shall conform with Clause 2.4.4.
(c) The physical properties of the parent material specified in Clause 3.4 and the rainfall performance specified in Clause 3.3 shall not be detrimentally affected.
(d) The physical properties for any colour-processed area shall conform with the physical properties of the parent material specified in Clause 3.4.
NOTE: This requirement includes resistance of the colour-processed areas to solvents.
(e) When subjected to accelerated weathering testing in accordance with Appendix I, a colour processed material shall conform with the requirements of Clause 3.6 and the following:
(i) The film or process colour shall not show any evidence of cracking, crazing,peeling or lifting from the parent material.
(ii) In respect of the colourfastness the material shall continue to meet all of the requirements of Clause 3.2.