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Solar eclipse postage stamp uses special ink, changes when touched
9NEWS.com The ink is sensitive to ultraviolet light, which means it should be stored away from direct sunlight. The Postal Service will sell a special envelope to safely store the stamps, which go on sale June 20 at a special event celebrating the summer … In the path of totality: where and when the Total Solar Eclipse stamp will debut JUST IN: Pre-order the new heat-activated solar eclipse stamp |
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