For those moments when we are not quite sure what our counterpart actually means something, we have a “credibility test” developed over generations at our disposal. When in doubt, we fall back on the oldest, most proven signal system, body language, then on the voice and last but not least we trust in the content of what is being said.
My name is Marco Jänicke. I am the man behind www.bravecroc.de. I have been working in technical communication for 20 years. With a career as a maintenance mechanic and subsequent studies in mechanical engineering, I initially worked as a design engineer and editor and currently work as a freelance consultant, trainer and author for technical editing and illustration.
The colors of the ISO 7010 safety signs are defined in ISO 3864-4. This means that in the informatively named Annex E, color names from different color systems are given as examples for the individual safety colors. The specifications are therefore not normative specifications in the proper sense, but are absolutely useful in practice.