Intensive courses of printing processes



Intensive courses of printing processes



Lector:

Topics reviewed:


Yelena Kuzmina,

SIA „Poligrāfijas tehnoloģiju konsultācijas”.

Language of lecture:

Latvian or Russian.

Students can get Russian or Latvian materials of lecture (it depends from the participants will).

• review of print production types;

• parameters of quality checking;

• measuring units in printing industry;

• description of print types;

• description of pre-press types;

• description of post-press types;

• holding a print production;

• transportation of print production;

• description of printing material types (paper, foil, film, etc.);

• description of material types for print process (inks, IPA, chemicals, etc.);

• planning of production processes;

• making an estimate;

• client management.


Intensive courses of printing processes



Lector:

Topics reviewed:


Yelena Kuzmina,

SIA „Poligrāfijas tehnoloģiju konsultācijas”.

Language of lecture:

Latvian or Russian.

Students can get Russian or Latvian materials of lecture (it depends from the participants will).

• review of print production types;

• parameters of quality checking;

• measuring units in printing industry;

• description of pre-press processing equipment and software types;

• description of printing press types;

• description of post-press types;

• review of pre-press processing;

• review of post-press processing;

• holding of half finished goods and print production;

• transportation of half finished goods and print production;

• review of print carriers;

• review of source materials (inks, blankets, additions, etc) for traditional offset;

• planning of production processes.


Intensive courses of printing processes



Autor:

Topics reviewed:


Alexey Shadrin,

imaging technology specialist, St-Petersburg.

Author and translator of fundamental labours about scientific researches in reproduction of color

Lector:

Alexander Rudenko,
SIA „Poligrāfijas tehnoloģiju konsultācijas” pre-press and imaging technology expert  

Language of lecture: Russian. Can be simultaneously interpreted to Latvian. Students can get Russian or Latvian materials of lecture (it depends from the participants will).

•  types, formats, components of images;

•  constitution of human sight organs, how it work. Myths and wrong opinions.

•  measures of colour senses. Bases and history of colorimetric science;

•  colour grid systems;

•  reproduction of colour senses. Colour differences and ΔE;

•  optimal visual contrast;

•  position of spectrometric use in process of image reproduction;

•  position of densitometry use in process of image reproduction;

•  devices for measuring a colour senses;

•  colour gamut of devices. Myths and wrong opinions;

•  abstract devices for colour reproduction;

•  work mechanism of CMS. CMS settings of graphic editors;

•  monitors screen, like tristimulus colorimetric aggregate;

•  lighting at work place;

•  equipment and software;

•  profiles for different devices and processes, what they contain;

•  soft-proofing. Video system, like initial image visualization device;

•  colorimetric adjustment for input devices (scanners, digital photo cameras);

•  colorimetric adjustment for output devices (desk printers, printing presses);

•  theory of image reproduction on surface/area. Light and colour;

•  autotype. Screen angles and trapping;

•  theory of spot (pantone) colour reproduction;

•  theory of full (process + spot) colour printing;

•  analog and digital colour proof. Theory and practice.


Intensive courses of printing processes


Autor:

Topics reviewed:

Alexey Shadrin,

imaging technology specialist, St-Petersburg.

Author and translator of fundamental labours about scientific researches in reproduction of color

Lector:

Alexander Rudenko,
SIA „Poligrāfijas tehnoloģiju konsultācijas” pre-press and imaging technology expert  

Language of lecture: Russian. Can be simultaneously interpreted to Latvian. Students can get Russian or Latvian materials of lecture (it depends from the participants will).


"Display image" not analogue to "paper image"! Help!

Although it seems very easy, fundamentally it is very important and complicated problem to solve, and it is not possible to solve within one seminar. There is no universal tool and can’t be in principal, and a “magic key” doesn’t exist. Solution is not a Macintoch system computer too.

To solve the problem you can with good knowledge and significant managerial efforts.

Course is addressed to specialists, which want to digest colorimetric adjustment and setup using methodic, technology of soft-proofing organization and get skills to remove fast not precise colour reproduction problems, which will certainly appear.

Considerable result can only get after understanding colorimetric meaning, by digesting theory. Joint colorimentric adjustment of monitors is possible if proper software instructions will follow step by step. Soft-proofing organization is effective destination to adjustment performance and removes problems with not precise colour reproduction, but it isn’t possible without digest of colorimetric basics, which is in the theory part of this course.

•  Not every monitor can be adjusted

Human can feel colour sense not only by electromagnetic radiance, but by physical, chemical, physiological or psychical impression result as well. Combination of these factors can be colour inducement too. This course, will review colour inducement of electromagnetic radiance visible spectrum section.

Monitor is three-stimulus visual colorimeter. This part of the course is about construction of colorimeter and why it’s necessary, about the demands from devices in colorimeter role, about different colour actuations, which raise colour senses in humans mind.

•  Monitor-colorimeter is not linear device

Why the monitor is not linear at energetic surface and how can divert this property. Why is necessary gamma correction and how to make shift without it.

•  CMS and monitor interface

Actions to adjust colorimetric monitor. What is calibration and characterization of the monitor? Why these actions are needed?

•  Mechanism of vision adoption. Lighting at the work place

Vision adoption developed in evolution process. This mechanism ensures constancy of identification of objects over the world in spite of changes in light conditions. Therefore, adoption is not “vision spoof” or “fault of eye”, it is absolute, mechanism guarantying survival. Different mechanisms of vision adoption. Adoption by contrast. Adoption by brightness (or adoption by white colour). What function they fulfill. How to reckon vision adoption impression in organization of colour proofreaders work place. Typical mistakes and recommendations.

Reasons of differences between printing copy and image on screen, when compared together. And can be matched at all.

•  sources of light for survey devices, and background light sources in special work room (digital darkroom)

Selection of light sources definition parameters for survey devices, ie. sample lighting source, photometric and colorimetric characteristics of lighting source.

•  Selection of colorimetric settings adjustment for monitor

Using facilities of monitor-colorimeter:

- monitor-colorimeter will be use, like unassisted colour reproduction device. Precise colour sense picture is challenge of this device. Dates of colour sense are saved in the image file. Visual parallel with image on other bearer will not perform (printing in plant afar from image processing place, web design, video film viewing, for example);

- monitor-colorimeter will be use, like soft-proofing device, which emulate particular subtractive device work (all printing types, photo utilities), that is, visual parallel with image on other bearer will be regular;

- monitor-colorimeter will be use, like scanned slide images viewing device. In this case, meaning regular visual parallel with image on slide original.

- monitor-colorimeter will be use, like unassisted colour reproduction device, like soft-proofing device and like scanned slide images viewing device too (polyfunctional system).

First, second and third variant we mark like “monitor-colorimeter with fixed adjustment parameters”.

Visual time of monitor colorimetric adjustment settings

Why can be needed visual time regulation of choice adjustment settings.

Instrumental time of monitor colorimetric adjustment settings

Types of monitor colorimetric adjustment settings instrumental time. Difficulties of video systems in colorimetric adjustment.

• Software and measuring devices for monitor adjustment.

Review of software and devices. Parameter choice of necessary device.

• Monitor time before colorimetric adjustment.

• Display front panel and work with it

CRT Displays

Position «RGB gain» («RGB»). Position «Contrast». Position «Brightness». Position «RGB bias».

LCD Displays

What difference is between video systems with LCD or CRT displays, and what to consider in adjusting.

Position «RGB gain» («RGB»). Position «Contrast». Position «Brightness».

•  Monitor calibrating on example of Profile Maker 5.x.x

Advantages of Profile Maker in comparative with other software.

How to calibrate monitor with CRT display, if it’s used like poly-functional system

Logic of Profile Maker software package

How to calibrate monitor with CRT display, if colorimetric adjustment is with fixed parameters

What advantages has video system with fixed parameters

Calibration specifics of video systems with LDC displays

What differences in the calibrating scheme is with CRT video systems, if calibration needed for video system with LCD display.

How to calibrate monitor with LCD display, if it’s used like poly-functional system

How to calibrate monitor with LCD display, if colorimetric adjustment is with fixed parameters

•  unification of monitor white point and examination device

Monitor and examination device grid unification by white point is needed to insure visual adaptation. How to do it?

•  Profile making for monitor

Purpose of profile making for monitor is getting to fixed dates, which characterize video system, like tristimulus visual colorimeter.

Profile making for monitors with using video system gamma correction

Profile making for monitors without using video system gamma correction

Monitor can’t be characterize like tristimulus visual colorimeter, if it isn’t possible to make gamma correction of video system by technical reason (if old version of video card, without LUT, has been used, for example). To make colorimetric adjustment is possible anyway, but without video system gamma correction quality.

•  Profile of monitor and that content

What information is possible to get from profile content.

Fourth version of profiles (ICC specification)

• Verification of monitor calibrations and characterizations quality

Verification of monitor calibrations quality

Basic calibration

Visual verification. Instrumental verification.

User calibration

Visual verification. Instrumental verification.

Characterization of monitor

Visual verification. Instrumental verification.

•  LUT and monitor profile editing

Why can be needed LUT and/or monitor profile editing.

LUT editing

Monitor profile editing

•  CMS work with monitor profile

Groups of graphic supplements and its “relations” with CMS.

•  Gamut clipping option in case of file screen visualization

Image color gamut compression shapes/types in case of graphic file screen visualization.

•  Monitor using like soft-proof device

It isn’t possible to work with monitor, like unassisted and valuable colour reproduction device, without initial colorimetric adjustment.

Display front panel (or monitor profile edition) adjustment for wanted “adaptation” to printing press or proof printer, can’t provide necessary result.

•  Possibility of errors and failures us monitor colorimetric adjustment result

All practice works are done on knowledge base, which achieved in theoretic part of this course. Mechanical activization of software commands/functions can give acceptable result, but can be unsatisfactory too. Expected and stability rerun calibration result can’t get, if isn’t digested and understood process matter, and colorimetric base.

Problems frequently occurred and its reasons are located in table.  

•  Service of colorimetric adjusted monitors

Period of validity for professional CRT display is around seven years. Regular checking and colorimetric adjustment makes possible to run effectively device all lifetime.

•  Visual estimation of lighting sources quality

•  Video system adjustment, if two displays are used

•  Adjustment of graphic editing software proofing options

Adobe software for graphic editing

Macromedia FreeHand software for graphic editing

Corel software for graphic editing

•  Video system adjustment in Adobe Gamma software