The ink is the heart of a copyright Monthly bill detector pen. Substantial-good quality ink must respond speedily and distinctly to copyright bills, leaving a clear, darkish mark on copyright paper. Search for pens that explicitly mention the sort of ink employed and its trustworthiness in figuring out various sorts https://angelouvwvq.blogsvila.com/39106161/5-essential-elements-for-hong-kong-100-dollar