| 摘要 |
Yellow and yellow-green fluorescent compounds are provided herein that can be incorporated into carriers (e.g., inks) and applied (e.g., printed) as security features on substrates (e.g., documents). The compounds can be selected based upon their resistance to humidity, and preferably exhibit a high initial fluorescence intensity, and a relatively high fluorescence intensity as well as a low relative intensity loss after prolonged humidity exposure. |
