OT7 Calibration


The OT7 Calibration target is like a tuning fork for musicians. 
Regardless of the instrument, “Middle C” = 261.6 hertz.

How does Opaltone OT7 Calibration work?

The vision behind Opaltone’s unique OT7 Calibration technology is to deliver a 
Global Standard for color reproduction in print. 

Whether you’re printing Flexography or Digital (in Europe or the Americas), OT7 Calibration evolves around the OT7 Hue Angle & Density Target. 

The OT7 Target is Device Independent. This means that irrespective of the printing device (or geographical location), the Hue Angle & Densities of the Opaltone Certified inks must be Calibrated* to the OT7 Target (throughout the tonal range).

Each printing device must be Calibrated* to the Opaltone OT7 Hue Angle & Density Target

For example, Opaltone Blue must be calibrated to print at the OT7 Target densities; 5%=0.12, 25%=0.29, 50%=0.52, 75%=0.85, 100%=1.25. 

The Hue Angle is also calibrated by the Opaltone Certified ink supplier to 274º (±2º). This procedure is simply repeated for each OT7 density value (just like tuning 6 strings on a guitar).

Opaltone Digital Color is only recommended for high quality process printing. (i.e. Poor quality and/or uncoated substrates are not applicable when referencing the OT7 global standard). For more information please contact Opaltone.

Will OT7 Calibration deliver consistent print quality?

Operator training in perfecting the OT7 System is based on how accurately you can hit the OT7 Target (each and every time). 
The term, "Hit the OT7" is your key to print consistency and repeatability! 

Unlike other confusing (CMYK) industry standards, OT7 is based on simple logic. Humans see color via density (using dots). 
Don't measure "dot-gain", simply measure density!

Print buyers continue to demand, "You must print to the numbers!" Under OT7, we finally know what the "numbers" are.
The question remains, “How good are you at printing consistently?”

*Calibrate means to linearize (any device) to a known standard.