Solar eclipse stamp uses color-changing ink and is available at the post office now – WKBW-TV
WKBW-TV |
Solar eclipse stamp uses color-changing ink and is available at the post office now
WKBW-TV COLORADO SPRINGS, Colo. – A Colorado company is behind a clever color-changing postage stamp that commemorates next week's total solar eclipse. Chromatic Technologies Inc. in Colorado Springs created the special ink that changes color depending … |
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