Yadda za a sovle matsalar fari spots a carbonless kwafin takarda?

Takardar kwafi maras karbuwa an raba shi zuwa babban takarda, takarda ta tsakiya da takarda ƙasa. Ana amfani da takarda kwafin carbon maras amfani don dacewa, sauƙi, da tsabtarta. Siffar, tasirin ma'anar launi, aikin inking, da ƙarfin saman takardan kwafin carbon marasa ƙarfi duk zasu shafi tasirin amfani da takardar kwafin maras carbon. Baya ga asalin fari da fari mai tsayi, bayyanar takardan kwafin da ba ta da carbon kuma tana da launuka kamar rawaya, shuɗi, ja da kore. Kodayake bayyanar takarda mai launin carbon mara kyau yana da kyau, yana da sauƙi don haifar da wasu matsalolin inganci, irin su fararen fata a kan takarda.

Matsalar ingancin ingancin farin tabo na takarda kwafin da ba ta da carbon ya fi faruwa a gefen CF na takardar. Akwai abubuwa da yawa da ke haifar da fararen fata a gefen CF. Gabaɗaya, akwai abubuwa masu zuwa:

Rashin ingancin dispersant zai haifar da mummunan tasirin tasirin launi a cikin fenti; lokacin da adadin masu rarraba ya yi ƙanƙanta, ɓangarorin da ba a nannade su da mai rarrabawa ba za su yi yawo da hazo saboda jan hankali na lantarki; lokacin da adadin masu rarraba ya yi yawa, tarwatsewar da ta wuce kima zai Rusa rufin lantarki biyu da aka yi ta hanyar pigment, haifar da rashin daidaituwa na rarraba caji kuma yana haifar da hazo. Lokacin da aka yi amfani da shafi akan injin, ba za a iya shafa ɓangarorin pigment ɗin ba kuma suna haifar da fararen aibobi a kan takarda. Za'a iya ƙayyade mafi kyawun adadin masu rarrabawa ta hanyar bincike na gwaji, kuma gabaɗaya adadin adadin da aka ƙara shine kusan 0.5% -2.5% na pigment.

Ƙimar pH yana da tasiri mai mahimmanci akan tarwatsawa (kwanciyar hankali) natakarda mara amfani pigments. Lokacin da pigment ya tarwatse, za a iya ƙara alkali don daidaita pH don zama alkaline, zai fi dacewa tsakanin 7.5 da 8.5.

Defoamers suna kawar da kumfa na iska a cikin fenti. Duk da haka, defoamer gabaɗaya abu ne na halitta wanda ke da wahalar narkewa cikin ruwa. Yin amfani da yawa ko hanyar haɓaka mara kyau zai haifar da defoamer don samar da "layin girgije" akan takarda, wanda zai sa murfin CF ya kasa yin amfani da shi kuma ya samar da fararen fata. Ana iya magance wannan matsala ta hanyar diluting da kyau da kuma fesa saman fenti tare da kumfa mai iska.

Rufin CF yana da kumfa mai yawa na iska, kuma lokacin da aka yi amfani da sutura, kumfa ya fashe a kan takarda, yana haifar da fararen fata. Wannan kuma shine babban dalilin da yasatakarda kwafi mara amfani yana haifar da cutar ta farar fata. Maganin shine ƙara mai hana kumfa don hana haɓakar kumfa lokacin da aka tarwatsa pigment, ko kuma ƙara mai cire foam don kawar da kumfa da suka riga ya faru.

Sauran kayan taimako (musamman kayan haɗin gwiwar kwayoyin halitta) da aka kara da su a cikin suturar CF, idan ingancin lubricant ba shi da kyau, zai haifar da tarwatsawa mara kyau kuma ya tsaya a kan takarda, wanda ya haifar da gazawar CF coatings don samar da fararen fata. Don haka a yi amfani da kayan taimakon sinadarai masu inganci gwargwadon yiwuwa.