I use fluorescent colors for marking valuable things for me. I look for a hidden, not easily accessible place and carry there with a fine brush on a Pünkchen. To this end, this color is wonderfully suited. After drying, one has to look very carefully if you want to distinguish the mark from their surroundings. Keeping, however, a black light to it, you see it glow bright yellow. Much, much striking, as for example in the blue color from the same producer that I have. The color also holds good, metal surfaces may make you though with a fingernail scrape - but not really any residue. Some leftover particles must always be seen under black light. Ideal for my purposes.
