There was white powder sticking to both chain and paper.

链条和纸上都粘有白色粉末。

The fingerprint dusting powders stick to oils and moisture left by the ridges on our fingertips and create a visible print that can then be lifted off using transparent tape.

指纹粉会粘在指尖隆起留下的油脂和水分上，形成清晰可见的指纹，然后用透明胶带把指纹擦掉。