| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a copper compound having excellent absorption in an infrared region at a wavelength of around 2500 nm.SOLUTION: A copper compound according to the present invention is obtained by the reaction between copper bromide (II) and another copper (II) compound. In the reflection absorption spectrum of powder of the copper compound measured using a spectrophotometer with an integral sphere, absorbance at a wavelength of 2500 nm is 0.2 or more.</p> |
