Indeed the PVC in braille signage has a depth of up to 3mm. That is to say, that injection moulded signage cause all graphics to be of a continuous nature. Undoubtedly, hygiene and compliance with the Building Code of Australia are the most important factors. Therefore the letters and dots are fixed and will not dislodge, as they are part of the moulding. Moreover moulded signage means that there will be no adhesive failure on symbols, letters or braille dots, which in turn extend the life of each sign.