Spot ink characterization chart
Test chart for measuring the spectral reflectance of spot colors. Also referred to as ink step-wedge chart.
The CxF/X-4 standard recommends the use of charts with 11 tints of ink printed on substrate and also on black background, as shown in the following figure:
1 |
Tint ramp: Solids and tints of spot color printed over white and black backgrounds |
2 |
White background (substrate) |
3 |
Black background |
| 4 | Substrate |
| 5 | Solid black |
| 6 | Solid spot color printed over white (i.e. over the substrate) |
| 7 | Solid spot color printed over black |
