Sanpo-yoshi Communication

Solve the mystery of color blurring of foil paper!

Solve the mystery of the color blurring of foil paper!

One day, a sales person asked me this question.

When we checked the paper, we found it to be foil paper, and when we looked at the color grain, we instantly sensed that it would be difficult to match it to the customer's stock of printed materials, which have various variations in color blurring, and that the customer would easily make complaints if they did not decide which one to match. Although Marushin's printing presses are more automatically adjustable, so the range of blurring would be reduced, the color variation from lot to lot was likely to be large in this design.
　Here I am reminded of something that happened more than a decade ago: "I feel that foil paper changes color more rapidly than white paper. I wondered why.

Naturally, there are factors such as the above, but I somehow feel that the color grain changes as the paper lot changes, and the color can also change drastically during the printing process.
I can't tell the color change by looking at the paper itself, my face is reflected in the same way, and I haven't been able to solve the mystery for a long time.

One day, I happened to see sunlight hitting the foil paper and reflecting off the wall, and the wall seemed to have red and green reflections. I thought it might be the way the light hit the foil paper, so I switched the location of the foil paper, and the colors on the white wall switched as well.

This is a color blur on foil paper!" I was extremely surprised.

The color difference between the foil paper itself and a white wall is not discernible, but when the light is reflected on the white wall, the color difference is apparent.

After testing, we found that the difference appears only when printing white or light colors, which is why light beige on foil paper becomes muddy even without blue blends.

Since then, we have tried to consciously explain foil paper as a paper with color blurring.