HSG supply chain partners undergo a rigorous vendor approval process in order to earn

“HSG Approved Vendor” status. To qualify, our partners must adhere to established ISO-compliant

product quality and environmental standards. High performance and consistency are ensured through

a regular auditing process during which suppliers re-qualify on an annual basis.


G7 Certification

G7® is a Method defined by the Print Properties and Colorimetrics Working Group of IDEAlliance. 

Initially G7 was developed by the IDEAlliance GRACoL Working Group.  But as adoption of G7 grew, it became clear that the application of

this method that enables printers to reproduce a similar visual appearance across printing types and substrates should be addressed by a

group with reach beyond the focus on sheetfed offset printing that is unique to the GRACoL working group. 

Today, through the PPC Working Group, experts from across the spectrum of printing disciplines contribute to this important IDEAlliance Methodology.

G7® specifies the components of an image that define a similar “visual appearance” to the human eye.

To do this, the G7 Method:

  • Defines a colorimetric definition for gray balance.
  • Specifies gray balance in the mid-tones, image weight and image contrast from the highlights to the shadows that determine likeness of the visual appearance of an image.