Hodnocení odolnosti tisku vůči oděru

Bc. Eliška Šmídová

Bachelor's thesis

Valuation of printing rub resistence

Abstract:

Pro testovani mechanicke odolnosti tisku v..i od.ru, ktera je v n.kterych polygrafickych vyrobach problemem p.i zpracovani zakazky, se v dne.ni dob. zkoumaji vlivy prost.edi a zdokonaluji zku.ebni metody a p.istroje. V teto praci bylo provedeno zkoumani vybranych druh. papiru, ofsetovych tiskovych barev, tonove hodnoty tiskoveho pole, doby zasychani barvy po tisku a r.znych dostupnych od.rovych za.izeni. P.i m..eni se potvrdily obecn. zname skute.nosti na vliv od.ru tisku, jako jsou men.i hodnota barvove odchylky ?˘E pro barvu s p.idavkem vosku; men.i hodnota ?˘E pro men.i procentualni zapln.ni tonove hodnoty tiskoveho pole; vliv drsnosti papiru; vliv doby zasychani tiskove barvy po tisku; rozdilne hodnoty ?˘E pro t.i zkoumana od.rova testovaci za.izeni- mechanicke od.rove san. UGRA vykazuji nejvy..i hodnoty ?˘E, poloautomaticke od.rove za.izeni Ink Rub Tester s pou.itym zava.im 0,9 kg vykazuje nejni..i hodnoty ?˘E od.ru tisku.

Abstract:

To test the printing mechanical resistance to abrasion, which is a problem when processing the contract in some polygraphic manufactures, environmental factors are examined and testing methods and instruments are improved these days. Selected types of papers, offset printing inks, tonal values of the press field, the colour drying time after printing and a variety of available abrasive equipment were examined in this thesis. The generally known facts on the effect of print abrasion were confirmed in measuring, such as a lower value of colour deviation ÄE for colours with the addition of wax; a lower value of ÄE for a lower percentage of full tonal value of the press field; the influence of paper surface roughness; the influence of colour drying time after printing; different values of ÄE for three lots of abrasive equipment which were examined ? mechanical abrasive sledges UGRA show the highest values of ÄE, semi-mechanical abrasive unit Ink Rub Tester with 0,9 kg weights exhibits the lowest paper abrasion value of ÄE.

Keywords

Oděr, oděrová zařízení, ofsetová barva standard, ofsetová barva s přídavkem vosku, bezdřevé oboustranně natírané papíry

Language used: Czech

Date on which the thesis was submitted / produced: 22. 6. 2012

Thesis defence

• Date of defence: 29. 8. 2012
• Supervisor: Ing. Hana Holická, Ph.D.

University of Pardubice

Faculty of Chemical Technology

Bachelor programme / field:
Graphic Arts and Printing Technology / Graphic Arts and Printing Technology