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    gravure ink viscosity

    Cutaway of Cambridge Viscosity's VISCOpro Sensor. Simple VISCOpro Touch Screen Operator Interface - Screen 1. The advantages of gravure printing lie in the high, consistent, and continuously reproducible print result. Reduce viscosity 2. Zahn No. PVB resins for Flexo & Gravure Printing Inks Drovin™ B-20 Drovin™ B-20 is a low viscosity grade of polyvinyl butyral resin. Cambridge’s multi-deck touch-screen display is shown below. Two screens accessible at the touch of a finger give operators complete control. Ink Viscosity Controller Weight drop viscosity measurement controller optimizes ink conditions. Each sensor had its own control at the individual unit where the operators make all the individual units color deck adjustments. Improve Ink Mileage Improve the startup procedure to reduce waste, use a less absorbent paper, get the prescribed viscosity by adjusting the ink –solvent ratio, reformulating the ink if the ink is penetrating the stock too fast, and All press equipment, including viscosity control systems, need to be much more reliable, require significantly less maintenance, enable shorter make-ready times, and be able to operate in a world where pressman skills are decreasing. This converter saved $80,000 in coating costs per year plus improved his quality and consistency by changing to Cambridge’s automatic viscosity control. If you are above the line, excess ink or coating material is being applied and money wasted; if below, inadequate coat weights result. A simple touch-screen interface option allows operators to quickly set up the sensors and allows for a quick at glance status of all units. The use of decentralized control and an VP1500 in-tank system proved to be the easiest for the converter to make-ready and operate. This extra margin translated directly into excess coating being applied and needless money being wasted. Excels in transferability and plate Representative results show viscosity control is important to color consistency. Known for innovation in viscosity measurement and control, Cambridge Viscosity specializes in the industry's most accurate, reliable, and easy-to-use viscometers for research laboratories and process environments. All press equipment, including viscosity control systems, need to be much more reliable, require significantly less maintenance, enable shorter make-ready times, and be able to operate in a world where pressman skills are decreasing. Under the normal environmental humidity, the ink printing viscosity is above 16S (Zahn No. gravure ink could not meet the requirements of printability in adherence, proofing density and dryness, the application of water-based ink on plastic had not been promoted. High viscosity ink 1. Adjust ink drying by adding slow solvent 5. In the pressroom the press might also be at 75°F at start-up as well, or 50 seconds is fine. Air drafts at nip 3. The main drawback is the difficulty in creating inks where the right combination of surface energies, ink surface tension and ink viscosity gives good patterning. 4. Gravure Ink Viscosity Viscosity Control Features That Converters are Now Demanding (Page 2) When controlling manually, the press operator gave himself a margin for error, as shown by consistently running the viscosity higher than necessary. gravure offset printing does not have any effect on the amount of transferred ink, because the set process transfers all the ‘offed’ ink from the blanket to the substrate. Small changes in the composition or impure raw materials result in different chemical and physical properties of the ink that might negatively affect the printing process. Cells plugged with paper, The strong correlation between temperature and ink viscosity suggest that fluctuations in temperature can have drastic impact on the ink viscosity. Gravure (Rotogravure) inks are solvent-based ink with low viscosity, which can be quickly dried by vaporization. Short body ink 2. Bleeding or smearing occurs when the color spreads into your coating or adhesive. Gravure-ink viscosity-dot gain-density-print quality-mottling This purpose of this paper is to examine the impact of ink viscosity on gravure optical print quality. Ink viscosity drops under high shear (shear thinning) and stays low for a while after being sheared (thixotropy). In fact, the company has additional patents applied for this critical function of self-cleaning. When controlling manually, the press operator gave himself a margin for error, as shown by consistently running the viscosity higher than necessary. Add clear varnish 3. If you aren’t able to maintain the proper viscosity of your ink, it may not dry before reaching the next station on your Our unique INKSPEC operating system provides unsurpassed control of the inking process to deliver high precision printing and color consistency. 856 gravure ink viscosity products are offered for sale by suppliers on Alibaba.com A wide variety of gravure ink viscosity options are available to you, There are 58 suppliers who sells gravure ink viscosity on Alibaba.com, mainly While some may not view this as the most dire of issues, it still affects your quality and can lead to waste and possibly rejections. All press equipment, including viscosity control systems, need to be much more reliable, require significantly less maintenance, enable shorter make-ready times, and be able to operate in a world where pressman skills are decreasing. (See photos at right). If the viscosity set-point is not temperature-corrected, you are giving away money! Further, it uses the piston’s motion to measure as well as scrub the sensing chamber clean automatically during and between ink/coating operations. Further, the And in addition, ink viscosity is strongly temperature dependent. When the job is completed the converter simply takes out the sensor and drops it into a bucket of solvent. Temperature: Temperature is also a key factor. Features Excellent printability. Customized solutions that maintain ink viscosity in print industries, including corrugated, gravure, and flexographic printing. Gravure inks are fluid inks with a very low viscosity that allows them to be drawn into the engraved cells in the cylinder then transferred onto the substrate. With more than 50 years of experience in our luggage, our engineers set out on a journey to set new standards in the field of viscosity technology. Ink systems, viscosity, surface properties of substrate material and dot structures on the gravure cylinder are the main factors that determine the print quality. Weak Print 1. Based on that, they might tell the pressman to maintain a viscosity of 50 cup seconds on a #3 Zahn cup to maintain the targeted coat weight or color concentration. Gravure Ink Viscosity Viscosity Control Features That Converters are Now Demanding Shorter production runs, OEM press automation, and competitive pressures are daily challenges for gravure. In gravure printing, the pattern is made up of recessed cells below the Neither shear thinning nor thixotropy is required for gravure coating but RaQ Adopting the way weight-drop method is more reliable by direct ink contact. It has the characteristic curve-shape shown. This can be managed a couple of ways: managing absolute temperature throughout the press equipment, process fluids and pressroom; or incorporate temperature-compensation into the viscosity measurement. In this rotogravure application the converter’s Bobst Lemantic press utilizes removable ink carts. With today’s electronics and software, temperature compensation is easily accomplished. At these raised temperatures, the viscosity to keep the correct solids concentration drops to 37 or 32 cup seconds. Gravure printing Coating volume Approx 4g/ (wet) Number of plates 175lpi 250lpi Ink type Solvent or Water based Plate material Iron (alturminum) core + plating Exhaust VOC Combustion Viscosity 15 – 17 seconds (No.3 cup) Press rooms are now looking to shrink make-ready time and gain productivity … It has a marked impact on the relation between viscosity and the solids concentration in the ink or coating, as shown in Exhitbit 3. Generates tight viscosity control to maintain professional process quality Whenever the ink or coating temperature varies due to changes in the press room temperature, the viscosity must be changed appropriately to maintain constant percent solids. Unfortunately, it is not. The color lab might be at 75°F, for instance. Wiping too Color consistency is influenced by a number of factors including color density, anilox volume, ink transfer, web substrate characteristics, doctor blade use and characteristics, as well as ink viscosity. Fasnacht presents the ORIGINAL! When the operator was not able to pay as much attention, significantly more material was applied. Exhibit 3: Viscosity, Temperature and Solids Concentration. ) and stays low for a quick at glance status of all units adjusting for the effects temperature! Viscometer utilizes a simple touch-screen interface option allows operators to quickly set up the sensors and allows for while! 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