1, imprint: There are obvious differences between photosensitive ink and ordinary ink. The imprint left by photosensitive ink on photosensitive seal is bright in color and not easy to blur for a long time. In contrast, ordinary ink marks on rubber and wood seals, metal seals, etc. The color will be lighter, and it will be blurred after a long time.
2. Usage: photosensitive ink is mainly used for photosensitive seals, which are sensitive to ultraviolet radiation and can absorb and cure ultraviolet rays, while ordinary ink can be used for rubber, wood seals and metal seals. , and more widely used.