Color Management
What is color management and G7 certification?
Proper color management isn’t just a part of the printing process, it is the printing process. The G7 certification program guarantees color consistency across all processes, substrates and inks.
RPI originated in the graphic arts industry as an expert in color. We began as a color separation business in 1969 dedicated to servicing the printing trade. Consequently, we understand that color consistency is one of the keys to having a successful brand. In fact, color matching is paramount in order to maintain brand integrity, visual identity and recognition. As a result, the G7 system certification program was created by the Rochester Institute of Technology and is administered by Idealliance (International Digital Enterprise Alliance), a non-profit membership organization created to share best practices and standards in the printing industry.
G7 Certification: A Universal Calibration
The G7 certification is a universal calibration program created in order to maintain accuracy in colors across systems and suppliers. In addition, the program evaluates the ability of printing software to calibrate the G7 grayscale definition using four 1-D curves. This method is used in many applications of printing including digital, offset lithography, flexography, and gravure.
G7 stands for grayscale plus the seven main colors used in printing; Four subtractive colors: Cyan, Magenta, Yellow, and Black (CMYK), meaning that they start with white and get darker as color is added until reaching black as they absorb light instead of reflecting. Additionally, there are three additive colors: Red, Green, and Blue (RGB), or the primary colors, which are reflective so as color is added they become lighter until reaching white.
RPI Graphic Solutions: G7 Master Certified Printer
G7 Master status is granted to physical facilities qualified to use the G7 Proof-to-Print Process and uses the most modern technology, techniques, and press controls to produce a close visual match from proof to print. Three levels of G7 Master Qualification compliance are available, G7 Grayscale, G7 Targeted, and G7 Colorspace.
G7 also uses four one dimensional curves to match neutral tonality between two G7 calibrated printing systems. Specifically, it was created to solve the problem of printing systems with different tonal value increases, or dot gains which cause color to look darker in offset lithography. The G7 method solves this problem by creating Neutral Print Density Curves (NPDC) that use half-tone dot percentages of an image instead of the tonal value increase curves. Most printing systems use half-tones to create images using a series of cyan, magenta, yellow, and black dots to recreate colors. This is done by varying the size of the dots so that the human eye perceives one uniform color.
Comparison of print processes with and without G7
Consistent, Efficient & Clear Printed Communication
Ensures consistency:
- Through continuity of brand integrity and brand recognition
- With a similar appearance across multiple devices
- In reaching desired color targets
- With global specifications for targeting gray balance
- By reinforcing brand trust
Increases efficiency & savings:
- Through reduced design times and faster turnaround
- By reduced cost of proofing and shipping prior to print
- By reduced need for on-site press checks
- Through reducing waste and make readies during press runs
- With higher consistency in reprints
Clarifies communication:
- By ease of data sharing with supply chain partners
- With alignment across all processes, substrates, and inks
- By accurate representation of the emotional attributes of the brand
- Through clearer expectations regarding acceptable work
Simplifying a Complex Workflow
Today’s print and packaging workflows are complex, often involving multiple brand owners, design agencies, prepress professionals, and plating and ink companies, all providing input into the production workflow. This can make managing accurate color and print consistency a challenge.
G7 certification technology simplifies color communication across all internal and external stakeholders, from prepress and the ink room to production process control, these tools help RPI manage precise color and print specifications into one workflow keeping all your projects on brand, on time, every time.
Sources: idealliance.org, xrite.com
