GMI Color Management Solutions

Green One-Stop Printing & Packaging Service Provider - Asoka Printing

Introduction to GMI (Global Graphics Management International)

GMI is an internationally recognized packaging and printing quality certification system that places particular emphasis on color consistency and is widely used in high-end consumer electronics, toys, luxury packaging, and other fields.

Core standards: ISO 12647 (Printing Color Management), ISO 15339 (General Printing Standards).

Certification process: Document inspection → Printing testing → Color measurement → Data reporting.

Key requirements for GMI color management

Project	GMI Standard	Industry Standard
Color difference ΔE*	≤2.0 (key color ≤1.5)	≤3.0
Expansion of network	Offset printing ≤ 12%, flexographic printing ≤ 18%	No strict restrictions
Spot color matching	Pantone color card ±0.5ΔE	Pantone color card ±1.5ΔE
Measurement equipment	X-Rite eXact spectrophotometer	Ordinary densitometer

Delta E: An internationally recognized formula for calculating color difference, where the smaller the value, the closer the color is.

GMI Color Management Full Process Solution

1. Design end: Color standardization

Software Settings

The Adobe series (PS/AI/ID) uses SWOP (Coated V2) color profiles.

3D rendering software (such as C4D) synchronously embeds ICC property files.

File output:

All design drafts are converted to CMYK mode (direct conversion from RGB is prohibited)

Spot colors must be labeled with Pantone number+Lab value (e.g. Disney Red: Pantone 185C, L=46, a=72, b=36)

2. Pre press: Digital proofing and plate making

Digital proofing: using GMG ColorProof or EFI Fiery system, certified by ISO 12647-7

The Δ E between the sample and the final printed product is ≤ 1.5.

CTP plate making:

Network compensation curve (adjusted for different types of paper, such as copperplate paper/corrugated paper)

Linearization error of plate material ≤ 1%.

3. Printing process control

Control Item	GMI Solution
Equipment Calibration	The printing machine uses X - Rite IntelliTrax to scan the ribbon daily and automatically adjust the ink keys.
Paper Adaptation	Create ICC curves separately for different types of paper (such as matte paper / super - sensitive paper).
Real-time monitoring	Online scanning systems (such as Heidelberg CP2000) sample and inspect once every 500 sheets.

4. Finished product testing

Testing tool:

X-Rite eXact measures color blocks (measurement area ≥ 6mm ²).

Barbie SpectroPad is used for curved packaging (such as bottle labels).

Report generation:

GMI certification software automatically generates PDF reports (including data such as Δ E and branch expansion).

Common Problems and Solutions

Problem	Reason	GMI Rectification Plan
Large color difference between batches	Fluctuating whiteness of paper	Specify paper with ISO brightness ≥ 95% when purchasing
Spot color is too dark	Insufficient ink transparency	Switch to high - transparency base ink + pre - adjusted spot color
Excessive dot gain	Excessive printing pressure	Adjust the hardness of the blanket (Shore 75±5)

Cost optimization suggestions

Standardized ink: Reduce the use of spot colors and use CMYK+to expand the color gamut (such as ECG) to simulate 90% spot colors.

Centralized printing: Merge printing batches for products in the same IP series to reduce plate replacement losses.

Digital management: Using cloud based color databases (such as CGS ORIS) to synchronize data with factories worldwide.

Summary: The Core Value of GMI Color Management

Brand consistency: Ensure that global consumers receive packaging in the same color (such as Disney Red, Tiffany Blue).

Cost reduction and efficiency improvement: Reduce rework and increase the one-time printing pass rate to over 98%.

High end certification: Customers who have passed GMI include Apple, LV, etc., helping brands internationalize.

Through this solution, printing and packaging enterprises can systematically solve the problem of color deviation and meet the strict requirements of international brands.

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taurus@szasoka.com

It has more than 20 years experience in printing and packaging manufacture, and now it is one of the most professional leading at printing and packaing in China.

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Contact: fu xiao tao

Tel : +86 176 2049 7855

E-mail : taurus@szasoka.com

WhatsApp: +86 181 9524 8889

Address: Asoka Science Park, Guangtian Road, Songgang Town, Baoan District, Shenzhen, 518105 China.