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Half Tone
An image formed by a regular or irregular dot pattern in which the dots are all of equal density.

The named categories of colors such as “blue,” “green,” “yellow,” purple,” etc. One of the three main characteristics that describe a color (along with chroma and value).

Hue Shift
Print color change due to the unequal fade rates of individual colorants or yellowing of the paper base.

Humidity Sensitivity
The tendency of a print to become damaged by exposure to high humidity.

Chemical reaction between water and colorants, image layers, and/or papers resulting in their degradation. Acids, alkalies, and/or heat can accelerate these reactions.