Packaging printing atana i hriat tur colour difference phenomenon chi hnih .

Package printed matter-a color danglamna buaina chuan printing worker-te chu a tibuai hle. Color difference buaina chu a tha thei ang bera control theih a ni. Company product quality, reputation leh skill level of operation master tehna a ni. Chuvangin, company-te’n an ngaihven a ngai a ni.

Printed color hi a tlangpuiin phenomena pahnih ah then a ni a, pakhat chuan a awmzia chu: product color batch khat, mahse sample color rawng nen. Pahnih chuan: batch of color inang chiah chiah a sawi a, a then chu sample nen a inmil a, mahse thenkhat chu sample nen a inmil lo.

Tunah chuan a hnuaia thil hrang hrang atang hian kan sawiho duh a, kan chhui chiang duh a ni.

Pakhatnaah chuan, phenomenon hmasa ber (product batch inang chiah chiah, mahse sample rawng rawng nena inmil)

1, Mihring thilte: 1.1.

Tin, captain skill level hian tih tur a nei lo a, mahse captain mawhphurhna hriatna nen chuan, product color batch khat chu a inmil thei a, hei hian captain skill level a hniam lo tih a tilang a, mahse engvangin nge sample hian print down ngamna nen a inmil lo? First Signature a ni em? Hei hi a pum puiin captain mawhphurhna a ni. (O does it exclude the signature error, a nih chuan, hei hi signatory-a mawhphurhna hriatna nen a inzawm leh a ni).

2, lehkhabu rawng:

Paper of different whiteness hian printing ink layer color appearance ah effect hrang hrang a nei a. A varna chu ink chhunga black, red, blue emaw yellow hrang hrang nen a inang a, chuvangin printing-ah chuan ink tam tak awm mahse a danglam lo a, mahse ink tak tak chuan transparency engemaw tak a nei a, paper whiteness danglamna nen a rawng a nghawng a, chu chuan rawng hrang hrang a siam a ni. A hawnna ah chuan paper tam tak i hman a ngai a ni. A rit, a lian leh te, a lian te, a inang mahse, batch date hrang hrang siam a nih avangin, paper varna chu a danglamna engemaw zat a awm ang a, chu chuan printed product color rawng a siam ang. Chuvangin product printed paper ang chiah chu white paper ang chiah kha i hmang tur a ni.

3, paper gloss leh smoothness:

Print gloss chu paper gloss leh smoothness ah a innghat a ni. Offset color printing chu paper chunglama light incident a ni a, light chu mihring mit retina-ah a lang a, light hmangin a lang-sensitive cells te chu photosynthesis pawm tur leh a rawng hmuh theihna tur a ni. Paper gloss leh smoothness a sang chuan kan hmuh rawng hi a bul berah chuan ink layer hmanga rawn lang chhuak color a ni a, main color light saturation a sang a ni. Paper surface roughness, low gloss, diffuse reflection a neih chuan main color light saturation a ti tlem ang a, chutiang chuan kan mihring mit chuan print rawng chu a light zawkin a hria ang. Ink density inang chiah chu densitometer hmanga teh a ni. Smoothness paper glossy, density sang tak. Smoothness low gloss paper density hniam tak nei.

4, printed sheet surface treatment:

Film hmanga print chhuah, polishing, calendering, oil, printing leh surface treatment dang hmanga print a nih chuan hue inthlak danglamna℃hrang hrang a awm dawn a ni. Heng inthlak danglamna thenkhat hi taksa inthlak danglamna, chemical inthlak danglamna thenkhat a ni. Taksa inthlak danglamna hi product surface tihpun specular reflection-ah a lang ber a, hei hian color density-ah nghawng engemaw tak a nei a ni. Entirnan, complex film, UV varnish, calendaring, etc. te chu a rawng density a sang chho zel ang. Sub-sub-film, colour density tihhniam chungchanga matte color printing. Chemical inthlak danglamna hi glue, varnish, UV oil leh a dangte atanga lo chhuak a ni ber. Heng thilte hian solvent hrang hrang a nei a, chung zawng zawng chuan ink rawng a rawng a danglam vek a ni. Chuvangin, packaging offset printing, printing process post-Press a awm chuan, printing process hnua physical leh chemical inthlak danglamna chu printing ink density leh lab value hriat chian nan ngaihtuah a ngai a ni.

5, dry density value:

Offset printing product print zawh veleh chuan ink chu wet state-ah a la awm a, chutah chuan density value tehna leh drying hnua measured value chu a danglam a ni. Wet density, dry density value a hniam a, hei hi dry-back density value phenomenon a ni. Hei hi a chhan chu ink print thar hian leveling level engemaw zat a neih vang a ni. Mirror surface performance chu a performance a ni-based, a rawng a rawng a, a eng tha hle. Ink layer a vawt chuan a chunglam chuan diffuse reflection a nei a, natural luster chu print a nih aiin a fainin a ni. Printing pangngaiah chuan batch products a theih ang anga color tihtlem nan, control nan wet density test method inang kan hmang thin. Chu chu, product a wet hmasak ber a nih chuan customer-in a sign a, wet density tehna value leh l * a * b * value nen a inmil nghal tihna a ni. Product print hnuah (wet state), density value tehna hmasa ber leh l * a * b * value chu color control atan a ni. Dik tak chuan polarizer device hmanga densitometer hman a nih chuan light specular reflection vangin ink layer chunglam a ti bo thei a ni. Wet density a teh a, dry density pawh a hnai hle a, mahse a rawng control tihtlem nan a pui thei bawk.

6, Printing pressure: 1.1.

Printing pressure hi ink transfer-na condition pakhat a ni a, a chhan chu printing plate surface, blanket, etc. chu a flat tak tak thei lo a, paper chunglam chu a awm ngei ang, subtle convex emaw uneven thickness emaw a awm. Printing pressure chu a tlem emaw, a inang lo emaw a nih chuan, ink layer chu brightness inang lo tak phenomenon a ni tlangpui a, chuvangin "three flat" thlen theihna tur process chu a mamawh a, chu chuan printing plate surface, blanket leh substrate leh lining te chu a mamawh a, chu chu a flat deuh hlek a nih theih nan, ink color inang lo tak tak hmuh theih nan print-a print-a print tur a nih theih nan ink layer chu a thim zawk theih nan a ni.

Printing pressure a tling tawk lo emaw, a inang lo emaw a nih chuan, lining body leh printing plate surface a awm chuan contact tha lo a awm a, layout inking visual effects zawm tur chuan ink zat tihpun a ngai a ni. Mahse, hei hian ink consumption a tipung mai ni lovin, printing color leh printing dirty phenomenon siam awlsam a ni bawk a, chuvangin "sanping" (roller ink, water roller, roller flat) uniform leh constant printing pressure hmangin, colour avanga pressure dik lo a awm loh nan a ven theih nan.

7, light source hmuh duh chuan:

Offset printing products observation of color hian light source a nei tur a ni a, light engmah hian a rawng a hmu thei lo a, mahse light source chu a inang lo a nih chuan a rawng danglamna chu a ropui hle ang. A tlangpuiin natural light condition (chu chu standard light sources) hnuaiah hian color observation kan mamawh a ni. Light source colour atan light bulb pangngai i hman chuan a rawng chu a sen a lang ang a, a rawng dik taka hriat a harsa ang a, a tawp bera thil siam chhuah chuan color cast serious tak a nei ang. Chu bakah, light leh illumination angle chakna hian colour identification a nghawng bawk ang. Chutiang light source-ah chuan sample chu light intensity reflection-ah a eng a, a bik takin sample leh light source hmangin a hlat zawng hriat theih a ni. A chak zawk, a chak lo zawk. Chuvangin, hnathawh laiin point hnih kan ngaihven tlangpui thin: pakhat chu standard light source (Wavelength 400-700 vel emaw hman a ni a, pakhat chu light source intensity leh irradiation angle inang vek ngaihven a ni. Color mamawhna sang tak nei product-te tan chuan, tehkhin nan standard chung lamah printing ink sample dah tur a ni a, chutiang chuan a dik tawk lohna hriat theihna rawng inang lo tlemte hmuhchhuah a nih avangin. Chuvangin, practice kalpui dan chuan light sources ziarang leh a danglamna hmuhchhuah te hian a dik tak hriat theihna rawng chu direct takin a nghawng dawn tih min hrilh a ni.

Pahnihnaah chuan, a pahnihna chu (chutah chuan rawng inang, a then chu sample inang, mahse a then chu sample nen a inmil lo)

1, Mihring thilte: 1.1.

Chu hue prospective hmasa ber, ink-a a la balance loh chuan, a kawng zawng zawngah a inhawng tan a, non-stop adjustment of water, ink, side tune aside, chu colour print color batch khat a lo awm ngei tur a ni a, hei hi captain skill level, experience, character has a same ability to produce the same ability of product colour a ni.

2, Fountain solution:

Offset printing chu oil-tui repulsion principle hman a ni. He tui hian fountain solution a kawk a ni. A size hian ink layer rawng a nghawng nghal vek a ni. Ink layer lian tak light color, tui, ink layer te tak te chuan depth a color ang. Tui a tam poh leh ink emulsion na zawk a ni. Emulsified ink matte, a rawng pawh a eng. Emulsified ink printed matter hi a rawng tha lo mai ni lovin, bawlhhlawh, quit, imprint pawh a chak lo a, chuvang chuan quality problem a siam bawk. Chuvangin printing-ah chuan operation chuan printing plate-a dampening solution lian tham tak chu khauh takin a control tur a ni a, ink leh ink balance-ah pawh a thawk tha tur a ni. Tui a mamawh tlem poh leh a tha zawk.

3, print chhuah chakna: 1.1.

Printing speed hian printed matter rawng a nghawng dawn a ni. Hei hi a chhan chu car speed hian ink balance a nghawng dawn a ni. Express plate of water leh plate-a tui slow version chu a inang lo. Express plate tui atanga chhuak chu a te, slow plate lian tak tui vapor evaporation a ni. Tui lian leh te inthlak danglam avangin ink-a inthlauhna a thlen avangin ink rawng inthlak danglamna a thlen ngei ang. Chuvangin a tlangpuiin printing-ah chuan speed constant-ah ngaihven tur a ni a, absolutely can not drive fast. Hun engemaw chen chu slow takin, chuvangin printed prints chuan color a siam ang. Chutih rual chuan machine dinhmun a zirin a awm tur a ni bawk a, speed stable ber tur angin a insiamrem tur a ni. Entirnan, offset printing machine lakluh thenkhat chuan sheet / hour 16,000 chak ber leh domestic machine speed sang ber chu sheet / hour 8,000 a ni tih a tarlang. Heng speed te hi stable speed an ni lo. A tlangpuiin, imported machine leh domestic machine pahnih, stable speed chu a speed sang ber 70% chu a tha ber a ni a, chu chu: import machine 11,000 / hour, domestic machine 5600 / hour a ni a, he speed hi ink balance control awlsam tak a ni thei a, color a tihtlem theih bawk.

4, Roller tha lo:

Offset printing process, printed matter hian uniform ink color a hmu thei a, roller quality hian hmun pawimawh tak a chang bawk. General Cots hian ink roller, ink roller leh ink roller pathum an nei a, ink color shade-ah hian nghawng nasa tak an nei a ni. Ink roller a flexibility, stickiness, roundness, hardness leh surface finish te hian printed ink quality a tichiang hle. Ink roller elasticity tha lo, viscosity tlakchham, roll eccentric a awm chuan. Colloidal leh colloidal aging tha tak, etc., printing process hian inking a siam dan a inang lo emaw, a nghet lo emaw a nih a rinawm a, chuvang chuan printing ink buatsaih a inmil lo. Chuvangin, cots quality enfiah nan printing i tih hunah, ink plate-a printing cycle coated tinte chu a bul berah chuan a inang vek tih chian nan. Chuvangin, hna pangngaiah chuan rubber roller chu tihfai tur a ni a, chutiang chuan rubber roller-a paper dust leh bawlhhlawh awm chhunte chu paih chhuah theih a ni a, ink chu uniform taka thawn chhuah theih a ni bawk. Chutih rual chuan ink rollers leh ink roller leh printing plate inkar contact pressure pawh siamrem tur a ni. Chutiang a nih loh chuan ink transfer inang lo a awm thei a, chu chuan color danglamna nasa tak a thlen thei a ni.

5, hmanrua enkawl dan:

Machine performance tha tak neih reng hi printing ink quality tihsan nan rintlak tak a ni. Entirnan, machine a stable loh chuan pressure a inmil lo a nih chuan feeding a stable lo a, printing a awm fo thin a, case tam tak a awm bawk. chu printing color rawng a thlen theih nan a innghat a ni. Chuvangin a tlangpuiin hmanrua enkawlna tha tak kan tih a ngai a, machine lubrication pawimawh tak takte ngaihven a ngai a, chu chuan hmanrua chu a nghet taka a tizual loh nan. Offset press angin hna tha tak thawk turin, "Miyoshi" ( enkawl tha, hman dan tha, siamthatna), "will pali" (a hman duh ang, enkawl a ni ang, check, troubleshoot ang).

Printing colour siam chhan tam tak a awm a, control methods pawh chu a tam zawk a, chu chuan printing operation-a kan chhui chhuah reng a ngai a, accumulation, notes lak dan tha tak siam chhuah hi anmahni ngeiin an theihna tihchangtlunna atan a tha a, printing theory-a lehkhabu chungchanga lehkhabu chu a hun awl tha zawk hmuh theihna tur a siam a, guidelines tih tur theory a awm a, chu chu a tha zawk a, chu chu a tha zawk a ni, a tha zawk chu a sang zawk a ni. Face, hlawhtlinna kawngah i kal ang a, a awlsam zawk ang.