To address the creation of new products that trend seek

• No.2258-I
• [JIS]
• [TAPPI]
• [ISO]

The recent trend is that printing quality is upgraded and use of offset print is diversified. To respond to the requirements in printability with various kinds of paper and ink, a new evaluation method is keenly required from the industry. With conventional printability testers that are distributed widely, there is a problem that it is impossible to control the humidification degree in offset print testing. However, with this machine, the user can try laboratory offset printing by setting various conditions such as simulation of a humidifier, print pressure, printing speed, ink feeding procedure, printing time delay.
The machine features excellent abilities of quantification and reproducibility that allow the user to know properties of various kinds of paper ranging from middle quality paper and newspaper to wood free coated paper. It is useful for study ink transfer, lint, ink drying, trapping and reverse trapping, mottling, etc. The system is composed of two printing units, one offset attachment (humidifier), and one ink mixer to ink the four discs. Each of the two print units is given the capability to adjust printing pressure and set printing speed almost steplessly. It is also possible to set time delay from the first print unit to the second unit, useful for various tests on wet-on-wet basis.
Using this time delay, it is possible to perform set-off test to investigate the transfer of first unit prints onto the back of white paper rolled on the second unit. The inking system of this machine has a temperature-setting range of 15°C to 60°C by circulation of hot water, with the inking rollers divided in four sections to form a uniform film on the printing disc. As for picking test, there are two types available: one is a constant speed test and the other is an accelerated speed-printing test from 0 to 3 meters/second. Accelerated printing can be made linearly independently from printing pressure. In the offset printing process, it is possible that the ink is transferred from the printing disc to the rubber blanket for printing on the paper rolled on the disc. There is also an adjuster to uniformly apply pressure over the printing width, even under the changing printing pressure, increased or decreased.
Reference: 1985 Tappi Coating Conference Proceedings

• No.2258-II
• [JIS]
• [TAPPI]
• [ISO]

This system has two sets of 2-color press of standard type, capable of printing on wet-on-wet basis: this machine is designed most suitably to grasp the behavior of color printing in the process of commercial off-set press. For set-off test, it is possible to set three stages of time delay at a time for effective testing.

• No.2258-III
• [JIS]
• [TAPPI]
• [ISO]

With this machine, the specimen is dried when being put in the drying oven, and it is possible to test drying behaviors of specimens different from when subject to natural drying. This machine is also used for blistering test.

• No.2259
• [JIS]
• [TAPPI]
• [ISO]

This is an ink kneader with separate portions for the universal printability tester. After ink is supplied, push the button to automatically knead the ink, and move the printing disc to ink the roll. The time length of kneading and inking is set by the timer. The temperature of the ink kneading roll can be controlled by connecting it to the constant temperature water tank.

• No.2260
• [JIS]P-8129-1998
• [TAPPI]
• [ISO]3783

Printability testers are used not only for papers, but also for sheet like materials such as metallic plates and plastic sheets. This tester is designed to set thickness of ink, printing pressure and printing speed as desired, with three functions of accelerated printing, constant speed printing and interrupted printing. The machine is of two-shaft type for process printing, with a range of 0.1 sec. to 6 sec. between the firs print and second print. This is a process printing tester to offer effective data by simulating the conditions of a practical process printing press. Because of featuring a high precision, in the accelerated printing mode, the printing speed changes linearly.

• No.2264
• [JIS]P-8129-1998
• [TAPPI]UM 591
• [ISO]

For the process of print testing, correct ink sampling is an important factor affecting test precision and test reproducibility. This pipette is used to sample a small amount of printing ink to be fed to the ink kneader, and with this pipette, it is possible to perform correct testing. The structure of the pipette allows the ink to be charged from the top end to the cylinder section. Reading the scale of the micrometer, squeeze the ink from the top cap by turning a screw that is linked to the plunger. The pipette can be disassembled to facilitate cleaning.

• No.2261
• [JIS]P-8129-1998
• [TAPPI]UM591
• [ISO]

In order to measure paper surface strength, the IGT testing method is widely used in the paper making process and printing process. This tester is very convenient for printability management, because with this tester, the user can learn characteristics in advance, easily. The standardized tester in Japan is widely used because of simple and easy handling. It features capability of keeping constant printing pressure, ink thickness, packing and printing speeds, as well as of changing them as desired. In addition, measurement is enabled even with a small amount of ink and paper.

• No.2262
• [JIS]P-8129-1998
• [TAPPI]UM 591
• [ISO]

This kneader depends upon IGT testing method, with a process of kneading the ink for a certain span of time, and is able to always form the stable ink film of a certain thickness on the printing plate.

• No.2270
• [JIS]
• [TAPPI]
• [ISO]

Needs for gravure printing have been increasing recently, with rapidly advancement of its technology. This tester has been developed under the guidance of the National Printing Bureau, to have functions similar to those of the practical press. Printing conditions can be set as desired, such as printing pressure, speed, contact angle and contact pressure of the doctor blade. This machine is composed of impression cylinder, plate cylinder, doctor section, ink vat and driving unit. Ink applied on the plate cylinder in the ink vat is scraped off by the doctor. The plate cylinder contacts the impression cylinder on which the specimen is wound, thereby transferring the ink to the specimen under a constant pressure to complete printing.
Referential standard: J.TAPPI No.24-2000

• No.2271
• [JIS]
• [TAPPI]
• [ISO]

Along with higher speed of the rotary gravure press, evaluation of drying property of prints has become ever more important. The Printing Bureau type gravure printability tester is widely used. On the basis of this tester, we KRK have developed a set-off test method in gravure printing. The tester developed is composed of a drying roller above the impression cylinder to apply a constant load. The drying roller has the same diameter as the impression cylinder, rotating at the same speed and in the same direction. A white paper sheet or film is wound around the drying roller. After a certain span of time following printing, lower the pressurization lever to make the drying roller contact the print. By observing the state of ink transfer onto the white paper or film, the drying property is evaluated.