(楼上的都不是)在顾及语法的前提下最内容作了适当调整使上下文连贯.可能翻译的不是很完美,
Ballpens are the commonly used writing tools by criminals.
It turns out that as time goes by,the maximum absorbency of the color in the printing ink gradually declines.Besides,the paper,sampling length and the kind of printing ink used also play an important role when it comes to determine how long the printing ink has been written.