common adhesive types are: Permanent – Typically not designed to be removed without tearing the stock, damaging the surface, or using solvents. The adhesion strength and speed can also be varied. For example, full adhesion can be nearly instant, or the label can be almost removable for a short period with full adhesion developing in minutes or hours (known as repositionable adhesives). Peelable – Adhesion is fairly strong and will not fall off in normal circumstances, but the label can be removed relatively easily without tearing the base stock or leaving adhesive behind on the old surface. The adhesive is usually strong enough to be applied again elsewhere. This type is frequently known as 'removable'. There are many different types of removable adhesives, some are almost permanent, and some are almost 'ultra peelable'. Ultra-peelable – Designed principally for use on book covers and glass, when removed these adhesive labels do not leave any residue whatsoever. Adhesion is weak and only suitable for light-duty applications. Normally these labels have very little adhesion to anything once they've been removed. Freezer or frost fix – Most permanent and peelable adhesives have a service temperature limit of -10 degrees Celsius, whereas freezer (otherwise known as frost fix) adhesives have a service temperature of -40 degrees Celsius and are suitable for deep freeze use. High tack – A type of permanent adhesive that exhibits a high initial grab to the application surfaces, and is commonly used at higher coat weights to enable labels to adhere strongly to difficult, rough or dirty surfaces. Application Labels may be supplied separately or on a roll or sheet. Many labels are pre-printed by the manufacturer. Others have printing applied manually or automatically at the time of application. Specialized high-speed label printer applicators may be used to apply labels to packages; these and other methods may be subject to recognized standards. Some labels have protective overcoats, laminates, or tape to cover them after the final print is applied. This is sometimes before application and sometimes after. Labels are often difficult to peel and apply. A label dispenser can speed up this task. Usability Aspects such as legibility, literacy and interpretation come into play for users of labels, and label writers therefore need some degree of professional writing skill. Depending upon country or region, international standards may be applied. Where literacy may be an issue, pictograms may feature alongside text, such