When you’re thinking about changing your print fleet, you’re faced with the question of how to do it cost-effectively. It is possible that your potential buyer will haggle and reduce the price, citing the fact that your machine is not in good enough condition. By providing the buyer with our inspection certificate, you exclude such manipulations.
However, this is not all we can offer you.
Do you know what “sabre dance” is in printing jargon? It is when an unqualified electrician cuts the wires in the printing press during disassembly and does not mark them. We have prevented dozens of cases of such barbarism. Just look at the photos on the title page.
If the customer is far away from the location of the purchased equipment, we can be present at the dismantling site and monitor the process. If necessary, we can also dismantle the equipment in full compliance with the manufacturer’s requirements.
To give you an idea of how we assess the condition of your machine, we will show you what our inspection process looks like depending on the package you choose.
Do you see a tablet in the technician’s hand in the photo?
You’re not wrong. The inspector actually inspects the printing press in real time and immediately enters the inspection data into our online database in Google Forms. In the same database, he attaches the photos taken to confirm the results of the inspection.
This test is suitable for the vast majority of users who are far away from the inspection site. It is also suitable where the purchaser print shop does not perform jobs of higher complexity, such as those using spectrophotometry, where high sheet accuracy is not required (lenticulars, IML printing, high speed perfecting work, etc.).
We inspect the machine in the process of operation and fill in a special check-list, which describes the current state of the main units responsible for quality printing. We test the equipment not only in printing mode, but also when changing plates.
We will pay attention to the performance and condition of densitometric or spectrophotometric print quality control – Image Control, Axis Control, Inpress Control, ACR and others.
Software licences and the number of hours of dryer lamp operation are specified. In addition, special attention is paid to the maintenance of the machine, as the attitude of the operating staff also affects the overall condition of the machine.
Procedure duration: One working day
Amount of paper: not required
Requirements: It is desirable (but not essential) that the machine is in working order. You need a printer/operator in charge of the machine.
You can also use this service if you need to remotely inspect the machine, to attend the installation on your behalf.
The service includes one day for the engineer to arrive and one day to return home. The price includes the basic costs – flight, accommodation, car hire at normal times (if the visit falls on holidays, events, when the cost of expenses increases, we can adjust the cost of the service accordingly).
Coloring: B-C-M-C, if more than 4 units, then further M alternates with C.
The speed of the test is arbitrary.
Paper quantity: approx. 50-70 sheets per unit.
Procedure: before printing it is necessary to turn on the pressure at idle speed on all units for 5-7 min. Then, using a torque wrench, re-tension the blankets with the set torque. Perform printing with 0.10-0.15 mm loosened pressure alternately on all units for 20-25 sheets. Take 1 or 2 sheets (depending on the press model) for inspection. If there is a noticeable difference in image in some areas of the sheet, reinstall the blanket by turning it 180 degrees and repeat printing on this unit. Evaluate the results obtained, set aside the control sheets marked with the date, model, press factory number and number of the printing unit. Take a photo of the results obtained.
Test duration: 1 hour
Amount of paper: 200-300 sheets of full format, 130-150 g/m2
Requirements: New blankets and underlay sheets installed.
Blanket tensioning is performed with a torque wrench (tightening torque depending on the press model).
Print cylinders must be thoroughly cleaned of dried ink and other contaminants.
Plates are arbitrary.
Print 70-100 sheets each time the press is started. Select at least 4 sheets in a row for inspection. Do not select sheets for inspection while the press is speeding up!
Align the lateral register using only the center element at the beginning of the sheet. For alignment, align all colors marked with numbers to the base black that is not marked with a number. Do not check or attempt to align the lateral register using other elements!
The next step is to align the circumferential register using only the two elements on the right and left at the beginning of the sheet. All colors that have numbers are also aligned to the black mark. Do not check or attempt to align the circumferential register using other elements!
The results are then evaluated for possible deviations in the sheet transfer, focusing on all 9 elements. The presence or absence of ” trapezium “, ” bow “, doubling and other defects is checked, both in the individual units and as a whole. All control sheets are put aside and labeled as in test 1, and photos are taken of each element, identifying its location on the sheet.
Important: the file is not screened, only individual plates are made!
The test speed is between 70 and 85% of the maximum press speed.
If the press has a perfector, it must be set to a straight mode.
Test duration: 3-5 hours
Amount of paper: required number of sheets is 100-150 per unit, 130-150 g/m2.
Requirements: New blankets and underlay sheets installed.
Blanket tension checked with a torque wrench.
The order of inks and colors remains from test №1.
Printing is performed on plates made from the special file issued by us. The file consists of up to 12 individual colors. For the test, the number of plates is made starting from form 1 (Black) according to the number of printing units.
This test also makes it possible to determine the defects of the sheet transfer system and the perfecting device without being linked to technological problems such as incorrect ink selection, dampening, humidity in the print room, etc.
Procedure:
During test printing, achieve optimum register alignment, check the operation of the spectrophotometric device, check the operation of the powder-spray device. Check 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.
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When using the materials of the site it is obligatory to indicate the link of source and the authorship.
© 2024 PressInspection™ All Rights Reserved.
When using the materials of the site it is obligatory to indicate the link of source and the authorship.