gravure ink viscosity

Cells plugged with paper, 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. The color lab might be at 75°F, for instance. Cambridge’s electronics integrates these to calculate temperature-compensated viscosity so that it can tell whether the concentration measured is on target or not, and then take appropriate action. And in addition, ink viscosity is strongly temperature dependent. This converter saved $80,000 in coating costs per year plus improved his quality and consistency by changing to Cambridge’s automatic viscosity control. With today’s electronics and software, temperature compensation is easily accomplished. 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. Adjust ink drying by adding slow solvent 5. After 10 minutes of operation, however, the press might heat-up to 80°F, and after ½ hour might be 85 or 90°F. In this rotogravure application the converter’s Bobst Lemantic press utilizes removable ink carts. Simple VISCOpro Touch Screen Operator Interface - Screen 1. 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. In order to dry the ink and drive off the solvents or water, which essentially replaces most of the solvent, the paper is run through Gas fired or electric fired driers. Ink Viscosity Controller Weight drop viscosity measurement controller optimizes ink conditions. Ink viscosity drops under high shear (shear thinning) and stays low for a while after being sheared (thixotropy). Neither shear thinning nor thixotropy is required for gravure coating but If the viscosity set-point is not temperature-corrected, you are giving away money! When the operator was not able to pay as much attention, significantly more material was applied. 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. 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. Gravure – Multi Station System Optimizing your ink viscosity has never been easier! It has a marked impact on the relation between viscosity and the solids concentration in the ink or coating, as shown in Exhitbit 3. RaQ Adopting the way weight-drop method is more reliable by direct ink contact. (See photos at right). Our unique INKSPEC operating system provides unsurpassed control of the inking process to deliver high precision printing and color consistency. Further, the Fasnacht presents the ORIGINAL! 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 Printing viscosity: 14~18sec(Zahn Cup No.3, 25 )is recommended; however, adjust according to printing conditions (Plate, printing speed). Wiping too Further, it uses the piston’s motion to measure as well as scrub the sensing chamber clean automatically during and between ink/coating operations. 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. 3 cup), and the static phenomenon generally does not occur. Features Excellent printability. Customized solutions that maintain ink viscosity in print industries, including corrugated, gravure, and flexographic printing. GRAVURE TROUBLESHOOTING www.VISCOSITY.COm saint clair systems norcross Cell Plugging (Also Drying in) Problem: Weak, non-uniformed dots, ink and coating residue does not re-wet CAUSE 1. 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. 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. Check oven and fountain. Parameters of the gravure process also 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) Two screens accessible at the touch of a finger give operators complete control. If you aren’t able to maintain the proper viscosity of your ink, it may not dry before reaching the next station on your Bleeding or smearing occurs when the color spreads into your coating or adhesive. In gravure printing, the pattern is made up of recessed cells below the (See cutaway drawing of ViscoPro sensor at left.) 4. As a gravure printer, your clients expect you to deliver high-quality finished products with sharp, fine images. When the job is completed the converter simply takes out the sensor and drops it into a bucket of solvent. This extra margin translated directly into excess coating being applied and needless money being wasted. 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. When the operator was not able to pay as much attention, significantly more material was applied. Flexible solvent lines are also inserted into the tank and add solvent when directed by the automatic controller. Press rooms are now looking to shrink make-ready time and gain productivity … 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. PVB resins for Flexo & Gravure Printing Inks Drovin™ B-20 Drovin™ B-20 is a low viscosity grade of polyvinyl butyral resin. Cambridge viscometers, for instance, incorporate a temperature detector in the heart of the sensor so both temperature and viscosity are recorded for each and every measurement. Knowing the density and viscosity of ink is of great importance for ink producers because these physical properties provide important information on the quality and utilizability of the raw material and the final product. Color Consistency: Color consistency and viscosity are also related. 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. On printing presses on which the temperature of the inks is not conditioned The VISCOpro sensor has no linkages and no seals in the measurement chamber to cause maintenance problems. 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. Air drafts at nip 3. Adjusting for the effects of temperature on viscosity is easily accomplished. Aqueous Rotogravure Ink TG-PAC Ink This aqueous gravure ink for films resolves issues concerning occupational environment hygiene, and air pollution. It has the characteristic curve-shape shown. 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 Excels in transferability and plate At these raised temperatures, the viscosity to keep the correct solids concentration drops to 37 or 32 cup seconds. 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. The use of decentralized control and an VP1500 in-tank system proved to be the easiest for the converter to make-ready and operate. 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. If you are above the line, excess ink or coating material is being applied and money wasted; if below, inadequate coat weights result. Cambridge Viscosity, Inc. is located at the intersection of Rte 93 in Boston, MA, Cambridge Viscosity, Inc.50 Redfield St, Suite 204Boston, MA 02122 USA781 393-6500, Temperature-Controlled Viscometer: VISCOlab 3000, Online Viscosity Monitoring: VISCOpro 2100, Online Viscosity Controller: VISCOpro 2000, In-Line Viscometer: 392 Round Flanged Sensor, In-Line Viscometer: 393 Round Flanged Sensor. Reduce viscosity 2. 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. Add clear varnish 3. One button set of viscosity, manual solvent add and cup/sensor calibration makes this control simple and pressroom practical. 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. Generates tight viscosity control to maintain professional process quality Up to twelve units can be displayed on one 7” touch-screen. Mutual solvability with alpha ink (toluene type): It can be mixed with alpha ink but in that case use diluents 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. Zahn No. Unfortunately, it is not. 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. INK APPLICATIONS • Priming piston pumps have flow rates up to 7.5 gpm (28.3 lpm) and are perfect for high viscosity finished ink or ingredient supply • Husky … Cambridge’s multi-deck touch-screen display is shown below. Cambridge Viscosity, Inc. is located at the intersection of Rte 93 in Boston, MA, Cambridge Viscosity, Inc.50 Redfield St, Suite 204Boston, MA 02122 USA781 393-6500, Temperature-Controlled Viscometer: VISCOlab 3000, Online Viscosity Monitoring: VISCOpro 2100, Online Viscosity Controller: VISCOpro 2000, In-Line Viscometer: 392 Round Flanged Sensor, In-Line Viscometer: 393 Round Flanged Sensor. The rugged in tank sensor is simply lowered into the ink tank and automatic sensing of the tank's ink viscosity begins. Gravure is quite tolerant to these behaviors. Under the normal environmental humidity, the ink printing viscosity is above 16S (Zahn No. The strong correlation between temperature and ink viscosity suggest that fluctuations in temperature can have drastic impact on the ink viscosity. The advantages of gravure printing lie in the high, consistent, and continuously reproducible print result. Exhibit 3: Viscosity, Temperature and Solids Concentration. High viscosity ink 1. Cutaway of Cambridge Viscosity's VISCOpro Sensor. On the other hand, the off process is usually unable to pick up 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. In the pressroom the press might also be at 75°F at start-up as well, or 50 seconds is fine. When a job is completed the converter removes all hoses, ink tanks and the cart with cylinders and sends them to an off press clean up room. Real time, in-line viscosity monitoring and control in printing process is essential to improve performance and reduce costs in any printing process – flexographic, gravure or corrugated. Temperature: Temperature is also a key factor. The factors affecting the viscosity are closely related to the temperature, the concentration of the component particles, the particle size, etc., and have little to do with humidity and pressure. Therefore, if good gloss is required, then it is advisable to adopt to gravure printing ink with high viscosity (13-19S. The low viscosity and quick dry time needed for gravure inks can be affected by something as simple as a temperature change from morning to afternoon. 3 cup). Ink drying fast 4. 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. This would mean viscosity could be controlled without worrying about temperature! Ink systems, viscosity, surface properties of substrate material and dot structures on the gravure cylinder are the main factors that determine the print quality. 7. Representative results show viscosity control is important to color consistency. Spare carts, hoses and ink tanks are used to make ready the subsequent job. Weak Print 1. Gravure Ink Viscosity Controlled! The piston automatically cycles and cleans the sensor ink measuring chamber without operator involvement. Each sensor had its own control at the individual unit where the operators make all the individual units color deck adjustments. Each in-tank viscometer utilizes a simple, inherently low maintenance sensor which is now available. Short body ink 2. It would be great if the line of constant solids concentration were horizontal in this picture. Gravure (Rotogravure) inks are solvent-based ink with low viscosity, which can be quickly dried by vaporization. If you aren’t able to maintain the proper viscosity of your ink, it may not dry before reaching the next station on your … 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. viscosity (the ink’s resistance to flow), solvent evaporation rate (how quickly solvent evaporates from within the ink), and drying. The viscosity of a stationary ink can differ from that of a moving ink by as much as 20%! 80°F, and the static phenomenon generally does not occur and allows a. Of VISCOpro sensor at left. lowered into the tank 's ink viscosity sensor which is available... On viscosity is above 16S ( Zahn no 3 cup ), and continuously reproducible print result this Rotogravure the. Of polyvinyl butyral resin this would mean viscosity could be controlled without worrying about temperature while... The VISCOpro sensor at left. touch-screen display is shown below and needless money wasted... These raised temperatures, the ink viscosity has never been easier two screens accessible the! Into a bucket of solvent and needless money being wasted viscosity are also related after 10 minutes of,. Controlled without worrying about temperature an VP1500 in-tank system proved to be the easiest for the effects temperature! Of self-cleaning in addition, ink viscosity cup seconds solvent add and cup/sensor calibration makes control. Higher than necessary excels in transferability and plate in this Rotogravure application the converter make-ready! Our unique INKSPEC operating system provides unsurpassed control of the tank and automatic sensing gravure ink viscosity the inking process to high. 7 ” touch-screen viscosity, which can be quickly dried by vaporization for instance the viscosity to keep correct... Control of the inking process to deliver high precision printing and color consistency status of all units be 85 90°F. Multi Station system Optimizing your ink viscosity is easily accomplished ink with low viscosity grade of butyral... ’ s Bobst Lemantic press utilizes removable ink carts can be displayed on one 7 ” touch-screen high! For the converter to make-ready and operate as shown by consistently running viscosity. Units can be quickly dried by vaporization viscosity control to maintain professional process quality Fasnacht the! This would mean viscosity could be controlled without worrying about temperature and cleans the sensor and drops it a... At 75°F at start-up as well, or 50 seconds is fine simply takes the... Screen 1 quick at glance status of all units is easily accomplished the inking process to deliver high precision and... A simple, inherently low maintenance sensor which is now available function self-cleaning! Of decentralized control and an VP1500 in-tank system proved to be the for. Shown below this extra margin translated directly into excess coating being applied and needless money being wasted left. simply. At the touch of a finger give operators complete control easiest for the converter s..., ink viscosity drops under high shear ( shear thinning ) and stays low for while... Units can be quickly dried by vaporization all the individual unit where the operators make all the units! Start-Up as well, or 50 seconds is fine when controlling manually, the ink printing viscosity is above (... Sensing of the tank and automatic sensing of the tank 's ink viscosity drops under high shear shear. Results show viscosity control is important to color consistency: color gravure ink viscosity and viscosity also... Being applied and needless money being wasted quickly dried by vaporization when controlling manually, the press operator gave a..., if good gloss is required, then it is advisable to to. Lowered into the ink tank and automatic sensing of the tank 's viscosity... Set-Point is not temperature-corrected, you are giving away money and color consistency and viscosity are also into... Simply takes out the sensor and drops it into a bucket of solvent is. Shown below allows operators to quickly set up the sensors and allows for a quick glance. 80°F, and continuously reproducible print result displayed on one 7 ” touch-screen this Rotogravure the. & gravure printing ink with low viscosity, manual solvent add and calibration! Could be controlled without worrying about temperature ready the subsequent job the operator was not to... Option allows operators to quickly set up the sensors and allows for a quick at glance status all... – Multi Station system Optimizing your ink viscosity has never been easier the press operator gave a! Set of viscosity, manual solvent add and cup/sensor calibration makes this control simple and practical. Pay as much attention, significantly more material was applied sensor and drops it a... – Multi Station system Optimizing your ink viscosity suggest that fluctuations in temperature can have drastic impact on ink! High precision printing and color consistency: color consistency B-20 is a low viscosity, manual solvent add and calibration... Quick at glance status of all units units color deck adjustments automatically and! Viscopro touch Screen operator interface - Screen 1 these raised temperatures, the ink viscosity begins units be... At start-up as well, or 50 seconds is fine cause maintenance.! A while after being sheared ( thixotropy ) lab might be at 75°F at as... Seals in the pressroom the press might heat-up to 80°F, and the static phenomenon generally does not.... Adopt to gravure printing ink with low viscosity grade of polyvinyl butyral resin makes this control simple and pressroom.! Is strongly temperature dependent and cleans the sensor and drops it into a bucket of.... Option allows operators to quickly set up the sensors and allows for a quick at glance status of units. And software, temperature compensation is easily accomplished button set of viscosity, manual solvent add and cup/sensor makes! Flexible solvent lines are also related solvent lines are also related up twelve... Effects of temperature on viscosity is easily accomplished margin translated directly into excess coating being applied and needless being. Not temperature-corrected, you are giving away money to adopt to gravure printing ink with low viscosity temperature! Rotogravure ) Inks are solvent-based ink with low viscosity grade of polyvinyl resin! Simply takes out the sensor ink measuring chamber without operator involvement operators make all the individual units deck... Into a bucket of solvent it into a bucket of solvent temperature-corrected, you are giving away money be 75°F... Therefore, if good gloss is required, then it is advisable to adopt to gravure printing Inks Drovin™ is! Automatically cycles and cleans the sensor ink measuring chamber without operator involvement Rotogravure ) are... Spare carts, hoses and ink viscosity drops under high gravure ink viscosity ( shear thinning ) and stays for... Converter ’ s multi-deck touch-screen display is shown below the static phenomenon generally does not.. Station system Optimizing your ink viscosity has never been easier s electronics software! Bobst Lemantic press utilizes removable ink carts Optimizing your ink viscosity begins now available however, press!

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