Bookmark - Handwashing: Why, When & How. Handwashing is an effective method at preventing infectious disease. Learn the appropriate times when to clean your hands and the proper washing methods to stay safe. This is not your ordinary bookmark. Every reader who uses these bookmarks will have an instant reminder of your business. Insightful and informative, these bookmarks bring added value to your customers. Printed in full color with glossy coating. Double-sided. Thick card stock.