Alert personnel of special handling instructions with Labelmaster's Method 50 Labels. Available in paper or rugged PVC-free vinyl, these are used to mark packs of items preserved with desiccants and warn that a package should not be opened until ready for use or inspection. These labels are designed to catch the eye of any personnel that comes within range of your shipments. We know how vital it is that your labels communicate the proper messaging, and we go to great lengths to help you get your job done right.