底漆(qi)和面(mian)漆(qi)的(de)作(zuo)用是(shi)不同的(de)，在要求上(shang)面(mian)也是(shi)有所區(qu)別的(de)。底漆(qi)：要求做到填充快捷、容易打(da)磨、減少飛漆(qi)。面(mian)漆(qi)：需要顏色均勻、流平(ping)性(xing)好(hao)、光(guang)澤飽滿。做到上(shang)述的(de)要求才(cai)能達到完美的(de)噴涂。

　　噴槍對涂料的橢圓形噴幅主要可分為有三層：最里面一層為濕潤層，中間是霧化層，外面是過噴霧化層。面漆主要是給被涂物件表面著色和裝飾作用;面漆噴槍要(yao)(yao)求顏色噴(pen)涂均勻(yun)(yun)，并(bing)且流平性(xing)要(yao)(yao)好，所(suo)以(yi)面漆(qi)(qi)噴(pen)槍(qiang)強(qiang)調(diao)(diao)霧化(hua)(hua)效果，噴(pen)幅(fu)(fu)必須是(shi)(shi)霧化(hua)(hua)層(ceng)(ceng)應(ying)比濕(shi)潤(run)(run)層(ceng)(ceng)要(yao)(yao)寬大(da)。底(di)(di)漆(qi)(qi)是(shi)(shi)填(tian)(tian)充待涂物件表面的砂(sha)痕或沙眼。底(di)(di)漆(qi)(qi)噴(pen)槍(qiang)主要(yao)(yao)是(shi)(shi)要(yao)(yao)求填(tian)(tian)充性(xing)要(yao)(yao)好、并(bing)不(bu)強(qiang)調(diao)(diao)其(qi)過噴(pen)霧化(hua)(hua)太大(da)。底(di)(di)漆(qi)(qi)噴(pen)槍(qiang)的噴(pen)幅(fu)(fu)必須是(shi)(shi)濕(shi)潤(run)(run)層(ceng)(ceng)應(ying)比霧化(hua)(hua)層(ceng)(ceng)要(yao)(yao)寬大(da)，它只需要(yao)(yao)將(jiang)底(di)(di)漆(qi)(qi)均勻(yun)(yun)地噴(pen)涂到工件的待涂表面即可，霧化(hua)(hua)層(ceng)(ceng)應(ying)比濕(shi)潤(run)(run)層(ceng)(ceng)窄小(xiao)，尤(you)其(qi)是(shi)(shi)過噴(pen)霧化(hua)(hua)層(ceng)(ceng)更不(bu)宜(yi)過大(da);底(di)(di)漆(qi)(qi)噴(pen)涂要(yao)(yao)求填(tian)(tian)充性(xing)要(yao)(yao)好，而(er)填(tian)(tian)充性(xing)主要(yao)(yao)靠濕(shi)潤(run)(run)層(ceng)(ceng)來完成(cheng)