Format in 3 mm-thick methacrylate for photoluminescent sign It has adhesive blocks that enable it to be mounted on a wall separating it 3 mm from the same. Designed in accordance with the UNE 23034 standard with maximum observation distance of 10 metres, suitable for compliance with the CTE in its DB-SI core document. Photoluminescent emergency sign complies with the UNE 23035 standards.