Printing Test 3
Print Process Test
Print in 4 CMYK colours from our Process Calibration file to produce a colour image with various printing process controls. To check the performance of the spectrophotometric colour control and to supplement and confirm the results of the Karo test.
Important: this test alone does not give a complete picture of the technical condition of the machine, as the print parameters to be checked are mainly related to the technology and consumables used by the print shop.
Important: this test alone does not give a complete picture of the technical condition of the machine, as the print parameters to be checked are mainly related to the technology and consumables used by the print shop.
The calibration scale is the same test familiar to the eye of the average printer that print shop owners ask for.
This test is used to calibrate the printing process and to calibrate the control device of the printing machine – e.g. Axis Control, Image Control, Densitronic S, LITHEC Lithoscan Professional.
Of course, the test also identifies some defects in the sheet transfer system and the perfecting device. But it is not really applicable to testing a used machine – it demonstrates the technological features of a particular print shop.
Procedure:
During test printing, achieve optimum register alignment, check the operation of the spectrophotometric device, the powder sprayer. Pay attention on additional printing parameters. Set aside at least 5 test sheets and mark them as in the previous tests.
Test duration: 1-2 hours
Amount of paper: The required number of sheets is 100-150 per unit.
Requirements: Blankets tension checked with a torque wrench.
BCMY ink order.
If a perfector unit is present, it is mandatory to use units before and after it. Printing in 4+0 mode.
Printing is performed from the file issued by us. Applicable screening is 150 l/inch.
Printing speed 70% of the maximum press speed.
Required amount of paper 200-250 sheets per unit.
Don't Forget That...
Colouristic characteristics of different printing inks
When testing the spectrophotometric devices of printing machines, it must be taken into account that printing inks from different manufacturers have different colour characteristics. The use of different pigments in the production of inks means that the machine must use different colour profiles to achieve the desired colour.
This problem has been recognised for a long time. At one time, GretagMacbeth specialists conducted a number of tests, compiled the colour characteristics of the different paints available at the time, and created a spectrum map.
The diagrams show the comparison of different colours with the ISO-12647-2 standard when measured on black and white.
This problem has been recognised for a long time. At one time, GretagMacbeth specialists conducted a number of tests, compiled the colour characteristics of the different paints available at the time, and created a spectrum map.
The diagrams show the comparison of different colours with the ISO-12647-2 standard when measured on black and white.
Measurements on all colours are taken at the maximum achievable grey balance with an even gradation characteristic.
Measurements were made on Gretag Macbeth Spectrolino, D50, No filter
© Alexander Pylsky, Mikhail Sartakov, cielab.xyz
Measurements were made on Gretag Macbeth Spectrolino, D50, No filter
© Alexander Pylsky, Mikhail Sartakov, cielab.xyz
Printing Test 1
Kiss-Print Test
The purpose is to check the condition of the surfaces of the plate, blanket and impression cylinders, the condition of the cylinder bearings and the compliance with the set pressure values of the lower printing pair (blanket - impression cylinders).
Printing Test 2
Karo Print Test
The task of the test is to determine the condition of the sheet transfer system as a whole and between individual units. With the help of decoding of this test the general condition of the sheet transfer system at all - grippers, perfecting device.
Printing Test 3
Calibration Print Job
The task is to produce a colour image with various printing process control elements. This test alone does not give a complete picture of the condition of the press, because parameters are mostly related to the technology and the consumables used.
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The condition of a used printing machine is always the result of the previous owner's attitude towards it.
Minimise your risks and book our inspection before you pay.
Minimise your risks and book our inspection before you pay.
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Al. Armii Ludowej 6, Warsaw
+48 222 304 015
+48 510 082 230
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+44 745 814 9221
The condition of a used printing machine is always the result of the previous owner's attitude towards it.
Minimise your risks and book our inspection before you pay.
Minimise your risks and book our inspection before you pay.
Where to find us?
Poland
Al. Armii Ludowej 6, Warsaw
+48 222 304 015
+48 510 082 230
United Kingdom
1 Canada square, London E14 9XQ
+44 745 814 9221
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