Explain the bar code printer thermal printing and thermal transfer printing working principle is what

Thermal printing and thermal transfer printing are two printing methods for barcode printers.　　Each method uses a thermal print head to heat the print surface. Thermal transfer printing uses a heated ribbon to print durable, long-lasting patterns on a variety of materials. Thermal printing does not use a ribbon, but instead prints the pattern directly on the label material.　　Check with your vendor or printer manufacturer to make sure the proper combination of media is being used, or request a list of approved options. Some users try to save money by seeking to purchase the cheapest media available on the Internet or from bargain sellers. This practice may result in limited savings, but often results in a higher total cost of ownership because inferior materials may reduce printhead life and result in penalties or liquidated damages due to labels with read quality defects when rated for labeling applications.　　Thermal Printing and Thermal Transfer Printing are the Best Barcode Printer Technologies Thermal printing uses chemically treated thermal media that darkens as it passes under the thermal print head. Thermal printers do not use ink, toner or ribbons. The simple design makes thermal printers durable and easy to use. Because there is no ribbon, thermal printers are less expensive to operate than thermal transfer printers.　　Patterns on thermal media fade over time. If the label is overexposed to heat, light, or other catalysts, the material will darken, making the bar code unreadable. The readability of thermal labels varies greatly with conditions of use, but the technology provides sufficient life for rated labeling and many other print applications where bar codes are printed by ordinary bar code printers. For example, after six months of storage in a distribution center, direct thermal labels can still be easily scanned and read.　　Thermal Transfer In thermal transfer printing, the thermal printhead heats the ribbon and the ink melts onto the label material to form a pattern. The ribbon material is absorbed by the media and the pattern forms part of the label. This technology offers pattern quality and durability unmatched by other on-demand printing technologies.　　Thermal transfer printers accept a wider variety of media than thermal printers, including paper, polyester and polypropylene materials. Thermal transfer printers produce durable rated labels, UL/CSA tags, stickers and tickets, as well as wristbands, permanent asset stickers, rack tags and other identification.　　Thermal transfer barcode printers are available with wax or resin ribbons Wax is the most common, inexpensive option for many labeling applications. Resin ribbons provide improved heat and chemical resistance and are mostly used for synthetic labeling materials. Resin-modified wax ribbons combine the best of both worlds and perform well on many label materials. To ensure printer performance and durability, the specific label material and ribbon must be carefully selected. The ideal ribbon selection depends on the material, printer and environment in which the label will be used. By choosing the right combination of media ribbons, users can produce high-quality labels that remain readable throughout production, logistics, and storage.