G7 does not limit ink, paper or pri

G7 does not limit ink, paper or printing method. As long as CMYK four-color printing method is adopted, G7 certification can be applied. Therefore, G7 is widely used in offset printing, digital printing, digital proofing, flexo printing, screen printing, embossing, gravure printing, and even large-scale inkjet printing. The objects involved include brands, traders Proofing companies, advertising companies, printing enterprises, and even equipment vendors. Therefore, G7 can be regarded as a generalized color authentication. GMI and PSO can only be regarded as narrow certification. GMI only certifies packaging and printing enterprises, covering different packaging and printing methods such as offset printing, flexographic printing and screen printing. However, business books, newspapers and periodicals and ordinary 4-color digital printing are not the objects of GMI certification; PSO certification is required to comply with ISO standards, and does not limit the printing business of books, periodicals and packaging, but is limited to offset printing and 4-color printing, so the word ISO 12647-2 will be displayed on the certificate. If it is digital printing, you can apply for PSD (process standard digital) certification, but Fogra does not cover flexographic printing, gravure printing, large-scale inkjet printing and other printing methods.