CIP4/PPF use the adjustment on the first offset printing ink
CIP4 has become a familiar concept in the industry and has begun to apply in practice. Between promises and actually achieved is still a distance. Error is not in the technology itself that is at the user. With CIP4/PPF people want instant color accuracy from times in the first data is transmitted directly from publishing.
Actually
achieved is only a rough adjustment process and still need to adjust
worker in the computer until achieved colors as desired. Why
so and how to achieve the desired accuracy is the color from clapping
all times in the first of which is the purpose CIP4/PPF. Scope of this article is to contribute to answer questions.
Requirements to apply successfully CIP4/PPF
Standardization is the prerequisite to apply CIP4/PPF. When it comes to standardization, we usually think of something distant as ISO, DIN .. but actually began standardizing sense "You can do anything but give the same results. Have a standard, a value can be measured in order to measure the colors to determine what we want. We can use standards available as ISO 12647-2 or Japan or SWOP standard. When
application of this standard it can not match the color of customers
felt in South Vietnam so let's start building their own standards in
accordance with the specific customer of our . In
fact the optical density value of the raw concrete color basic K D =
1.84, C = D M = 1:55, Y = 1.4 D according to international standards
for all in light, with degrees contrast and detail, but customers in South Vietnam there like other comments. They want all the color and stronger taste is not brilliant results in residual ink. When surveying the results usually give K = 2 D, C, M = 1.6 D or 1.65 D and Y = 1.4. After
all, the customers are paying for the product in so that is what they
want and what standards we must achieve within the chatter was all
first run. It
is important that we have numbers, not the color of goods in accordance
with our customers, then we have their own standards and that also the
values must satisfy the application CIP4/PPF to adjust before the offset ink.
The
objective of standardization is we can always know in advance the
results in color and the results can be repeated at any time. It will achieve in certain conditions and not in any condition any. Standardization must start from the supply of materials in. Quality products in affected by numerous factors in several different processes in which materials act as adults. Keep the number of categories of materials to a minimum, it could be any of the materials, but always there is no change. The reason given when continuously changing the category of materials due to price actually not convincing. Imagine we have four offset ink for different prices depending on the product and we have to change in ink 3 times a day. What
we save the price difference between the ink does not offset the costs
of machines are dead when cleaning ink system, the cost of wasted paper
products all the clapping, the cost of ink for ink consumption charge
balance . Must
have new approaches to this problem - keep to a minimum the category of
materials and more importantly keep it stable without change for a long
time.
Standardization is a prerequisite for the success of the application CIP4/PPF otherwise we know what we want specifically.
Comparisons with the adjustment of the offset printing ink on the first file CIP4/PPF
Based
on the data recorded RIP can create file CIP4/PPF for the first
adjustment on the ink in offset depends on the RIP have this option or
not. Essentially it is a low-resolution bitmap images show the entire print, as we scan the prints with a scanner of zinc. Creating
file CIP4/PPF only meaningful when used with CTF CTP because even if
not for the average full-page results can be applied because of lack of
information the size of zinc. In
addition to the bitmap image file contains more information CIP4/PPF
other and this will depend on the function of each RIP of different
manufacturers. Heidelberg
AG Druckmachinen the furthest advanced in this field, PPF file created
by RIP Meta Dimension contains management information such as customer
number, customer name, code production, job name, number in, information for setting parameters on the printer paper size, paper thickness, types of paper, ink etc.. All this information will be standardized standard JDF 1.3. At
this point the user often confused the concepts of systems compatible
CIP4 (CIP4 compatibility) and CIP4 system (CIP4 capability). If
CIP4 file containing all information mentioned above, it is a file CIP4
still not really it's just a CIP4-compatible file that contains part
information only. Most of the RIP, such as Harlequin, EagleRIP PPF file contains only create unique photo prints.
Steps to work with file CIP4/PPF
File
CIP4/PPF a standard file so it is compatible with all systems in the
conditions of correct information about printers and printer out
CIP4/PPF
File
CIP4/PPF can create a path is to use software to create files from
TIFF-B for recording of zinc, or even from the PDF file. Representing the software as is Inkzone. Many manufacturers printers, CTP provides software with a different name to make solutions for CIP4. The
files created by this system is CIP4-compatible files only it lacks
much important information as to achieve the purpose of color accuracy
from the first machine run.
Software to prepare data for the machine.
The
software can take many different names, of the Heidelberg Prinect
Pressroom Manager PrepressInterface or, as the MAN Roland Printnet
pressmanager or the Komori K-Station. The
mission of the software is calculating the percentage of India's
surface elements in the course of each type of printer ink,
respectively. One
thing to note that software is only calculated for Heidelberg in
Heidelberg machines, the Roland to Roland, the only story without using
Heidelberg calculations for Mitsubishi or vice versa. How
reality is different between firms, but the trend is a workstation
software is installed will act as a work station to prepare the center
for all printers.
File CIP4/PPF relatively small around 1-3 MB storage easily transmitted via LAN, FTP to the printer. If
you want to take advantage of all the functions of the CIP4 lkien is
required that is not on-line printer must also be networked. Use
environments such as job memory card Heidelberg, MAN Roland Chipcard or
floppy disk for the machine in Japan will be hosting the only parameter
adjustment ink cartridge for each course.
Spectral
color measurement devices or as ImageControl InpressControl spectral
color measurement on-line in Heidelberg printers also have color values
to the reference lab. These
values will be Prinect Pressroom Manager PrepressInterface or created
on the basis of the RIP file CIP4/PPF from publishing. This system is unique today and it shows the manufacturer Heidelberg far in this field.
Setting parameters of unlocking ink on offset printing machines
In
the central control station of modern offset printing machines always
have special line graphs of ink (ink presetting curve). When
reading the file CIP4/PPF was calculated per cent of India's surface
area, respectively for each ink key the program will calculate the
value of specific aperture of the ink tag.
The
problem exists as ink key opening degree calculated by this based on
only a percentage of India's surface can not be accurate. In worker must continue to adjust according to the article in paper and ink, depending on customers' disposal.