Reflecting on colory - Color control technology for papermakers

摘要

For a papermaker, getting the color of paper right is an important element of quality assurance. Customers expect envelopes to match their writing paper, and expect the paper they buy today to match the envelopes they bought months or even years ago. Different grades of paper manufactured with different machine settings can be required to have identical colors. Look carefully at this issue of ABB Review for example; the cover is slightly thicker than the other pages, yet the color matches precisely. Reproducing color is no simple task and would not be possible if it were not for advanced color-control algorithms and highly sensitive instruments. But it is not just sensitivity and reproducibility that these instruments must tolerate, they must perform under harsh conditions such as high moisture levels and thermal and mechanical shocks.