Concealer can be regarded as a kind of foundation. The difference is that concealer has better covering power than ordinary foundation, and it fits the skin better, making it lasting and not easy to take off. Everyone's face will have blemishes of this kind. Applying concealer can make your face smooth and detailed again. There are usually three types of concealer: liquid, cream and stick.
Start using it in the form of small dots. Use your ring finger to apply a solid or lotion-like masking cream directly on your face. For hard-to-reach places, use a sponge block or an inclined brush to apply. Foaming concealer usually leaves streaks on the skin, so before using it, you should smooth it on the back of your hand and use a soft brush to evenly spread the color of the collar.
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Preface The Finnish VTT Technical Research Center employs approximately 3,000 people and its technical expertise covers almost every engineering technology area. VTT cooperates closely with industrial enterprises and undertakes various scientific research projects. The scientific research results described in this article come from a three-year paper rheological performance research project. The partners of this research project include Metso Paper, 3 paper makers and 2 printers.
In recent years, the requirements for the performance and efficiency of printing presses have been greatly improved in the industry. The web width of gravure printers has been increasing. Therefore, it is necessary to conduct in-depth research on web properties and improvement requirements. The modelling software, measurement technology, and related services provided by the VTT Research Center enable papermakers and printers to further improve their operations. In general, paper rolls that have exhibited good quality in paper mills will also exhibit good quality in the printing industry. So the printer can choose the paper roll to get the best printing quality; at the same time, it can make the printing process more stable and save costs in many aspects. The use of VTT technology in the papermaking and printing stages for related measurements can further increase the correlation analysis speed and analysis efficiency between the two stages, improve the control accuracy, and minimize the instability of the printed product.
The absence of job problems in print production is a goal pursued by each printer, but it is actually far short. Some common problems that arise on the press include web breaks, registration errors, web instability, and the appearance of Wrinkles and other phenomena affect the operating efficiency of the printing press, reduce product quality, and cause huge economic losses to the printer. As press speeds and web widths continue to increase, the accuracy of control of the roll becomes more important.
So printers and papermakers must understand the dynamic properties of webs in order to achieve higher productivity.
In the past decades, paper manufacturers, printers, and scientific researchers have conducted numerous web-rolling job performance studies. Their research focus is generally on web breaks. In addition, research on web breaks mainly focuses on the strength of rolls. The executors of multiple studies are papermakers; there are also some printers that implement the research projects. One of the reasons for this is that due to statistical data collection, it is difficult to study the problem of web breaks on web presses. Only after researching thousands of paper rolls on the press can meaningful statistics be obtained.
The main purpose of our study was to improve the printing performance of the web by controlling the transverse tension characteristics of the web. The specific study was conducted at paper mills and printing plants; on-line measurements of web forces and other parameters were performed on the press. This paper mainly studies the roll paper force change and its related operation effect on the rotary gravure printing machine.
Measuring methods Rolling power at paper mills and printing plants is almost only seen as the load caused by the roll on the roll. This measurement method is not without problems, because the measuring instrument is susceptible to temperature and vibration, resulting in errors in the measurement results. In addition, the transverse web force cannot be measured by the above method. In order to improve the control of the web, people have to find new methods of measurement.
Metro developed the IQTension tension measurement system that measures the transverse tension curve. The basic principle is to measure the air cushion (film) pressure between the surface and the web. Curved beams cause the web to run in a direction of rotation. When the speed of the web is very fast, air cushions will form between the surface of the beam and the web, making it difficult for the web to contact the web. The web edge was introduced into the air cushion and touched the surface of the beam. The air pressure is related to the roll paper force.
IQTension tension measurement system includes a measuring rod, a test cabinet, and a data acquisition instrument. The web is wrapped at or below the test bar at an angle of 10-30 degrees. The air cushion pressure is measured with a pressure sensor through a small hole in the surface of the crossbeam. In order to make the measurement result unaffected, the sensor hole should be cleaned periodically. When the paper is cut off or stopped, the airflow can be automatically blown through the small holes to achieve the purpose of cleaning. Pressure sensor adjustment is also done automatically. Since the IQTension Tension Measurement System was first sold in 1996, 30 sets have been sold so far.
Measurement result:
The shape of the curve of the tension curve measured in the printing shop showed that the force curve of the web was convex (middle height, low on both sides), so the edge of the web was looser than the middle portion. This is mainly due to the stress applied to the web during the drying process. The convex tension curve makes the customer's paper roll different, but it will also affect the printing paper feeding performance.
The effects of supercalendering were also studied in three paper mills. As a result, it was found that the super calendering treatment had a great influence on the tension curve. The tension curve measured on the paper machine is significantly different from the tension curve measured on the reel and printer. In addition, even different supercalendered papers on the same production line will have different tension curves.
Supercalendered paper has very limited controllability. The nip load and the amount of steam injection were controlled during the test. Both of these control methods can be used to flatten the tension curve. (To be continued)
If the concealer is applied too lightly or too densely, it will make the makeup look unnatural. Therefore, you should choose different concealers according to your skin type to make your skin appear healthy. Paste and strip-shaped concealers provide better coverage, but are more difficult to operate. Concealers with low coverage capabilities can make makeup look natural because of their refreshing texture. Concealers are generally solid, but the viscosity varies. According to your own needs, you can choose products that are used in a large area or used locally.
Concealer has many functions, such as covering up acne marks, reducing spots or partial dullness, and reducing dark circles. Lightweight or dense concealer will make makeup unnatural, so choose a color similar to your skin tone.
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