6.在印刷過程中，油墨滲入紙張并在印張背面明顯地見到正面印跡，這一現(xiàn)象稱為

A.透印                                                              B.蹭臟 

C.粘臟                                                              D.重影

7.一般說來，鈔票、股票、禮券、郵票都采用____印刷。

A.平版油墨                                                       B.凸版油墨 

C.凹版油墨                                                       D.特殊版油墨

8.蠟在油墨中的作用是

A.干燥作用                                                       B.使印品表面耐磨性好，印跡清晰

C.降低成本                                                       D.增稠作用

9.油墨的顏色取決于

A.連結(jié)料                                                          B.填充料

C.色料                                                              D.助劑

10.U型瓦楞的特點是

A.抗壓強度大                                                   B.黏結(jié)能力差

C.黏合劑用量小                                                D.平壓強度低