In addition, papers with ability to change color
in the presence of UV were produced by adding these materials to paper tissue.
The TimeDot band, placed around the child's ankle, has separate zones that change color
at different time periods and correspond to the due date of a vaccine.
Some of the dyes are made of materials that change color
to show how acidic or basic a chemical is.
Each badge consists of two parts: The self-adhesive FrontPart is run through a thermal printer and then applied to a BackPart, self-adhesive or clipon, that has been preprinted with a specially formulated "migrating ink." Combining the two parts begins an irreversible timing process, which will cause the badge to change color
within one day, one week, or one month.
When the metalloporphyrins come in contact with vapors containing Chemical groups common to environmental contaminants, they change color
. By measuring the color change pattern, the researchers can identify a contaminant both qualitatively and quantitatively,
The pixel boxes will be installed at the OK Centrum fur Gegenwartskunst in Linz and change color
according to the movements of local pedestrians.
The researchers mixed clear paint with laboratory chemicals called pH indicators that change color
when the pH changes.
Tree frogs use their amazing ability to change color
to hide from predators and to hunt.
For a long while now, scientists have believed that chameleons change color
to avoid predators or to reflect their moods.
These tourists flock to the region as soon as leaves begin to change color
from a summery green to spectacular shades of red, orange, yellow, and purple.
Among them is the expanded line of Spectrachrome color-shift colorants, which change color
when viewed from different angles.