Is your monochrome ribbon still in good shape? If the ribbon material appears to be grey, it means that the black ink has been used up and it is time to replace the ribbon.

Are you using a color ribbon to print mainly black text? Doing so can cause the black part of the color ribbon to be used up too quickly. Switch to a monochrome ribbon whenever you plan to print mainly black text. Remember to make any necessary EDS changes when you change ribbon types.

Are you getting muddy-looking colors from a color ribbon? The more green, orange, and purple colors you use, the quicker the primary colors (blue, red, yellow) will become mixed with other colors. This will cause a drop in performance of the ribbon.

Remember that changing the ribbon before it becomes frayed or completely out of ink extends the life of your print head.

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Star Micronics HL 80825321 user manual