Ghosting is a common failure during the heat transfer calender transfer. As you pursue ending up being a skilled dye-sublimation printer, you may encounter several barriers such as your transfer coming out blurred, dull, or discolored. In the following, we have compiled some of the remedies connected with dye-sublimation printing you may experience.
1. The cushion material (such as cotton towel, sponge, cardboard, and so on) under the level textile heat transfer calender soaks up the ink wetness throughout the transfer process, which will certainly trigger too much water vapor throughout the transfer, as well as it will certainly make the picture color when it is moved to the cloth. It ends up being lighter or presents a part of aerosol or water streak-like problem.
So, it can be boosted by vaporizing the wetness on the pad cotton towel prior to transfer as well as during the transfer procedure. If possible, it must be prompt to change the pillow product.
2. The printed photos and also the material that to be moved need to not perspire as much as possible. Or else, the paper will certainly become soft as well as wrinkled throughout the transfer, particularly when the roller press just makes the paper soft as well as wrinkled, and red stripes will certainly appear on the transferred material. And the transfer rate will be lower, the color of the picture will certainly not be beautiful, and the rundown of the picture will thaw when it is serious. There will certainly be a shade difference in the cloth of dry transfer and also damp transfer– a lot more extreme the damp, the more serious the scenario.
As a result of the above aspects, the printed paper (to be transferred) and also textile should be positioned in a completely dry area, as well as the moisture needs to be regulated below 60%.
3. When moving under a level press, ghosting in some cases happens. The reason is that the paper is relatively level throughout the thermal transfer, and it will not bend immediately under the press, as well as the paper and also fabric can be squashed. Nonetheless, when the heat press plate is lifted throughout the thermal transfer, the paper will certainly be adsorbed on the upper press plate together with the fabric, and then fall down. Right now, when the high-temperature transfer paper falls on the material, the additional transfer will take place, causing light ghost pictures.
① Minimize the climb speed. We can change the cylinder (or hydraulic cylinder) rate control valve (throttle valve or throttle shut off) on the heat transfer calender, and deny the valve that regulates the stress plate’s lifting to make the training speed of the stress plate slower. By doing this, when the pressure plate is raised, the paper, as well as the cloth, are not easily gobbled with each other, which can protect against the issue of ghosting triggered by the additional transfer from falling off.
② Dip the four corners in water. If the transfer paper is smaller than the fabric, you can use a little water (a tiny dot, ≤ 0.5 square centimeters) to the four edges of the transfer paper without printing images, and afterward, cover it on the textile for transfer. After the transfer, the bond will be no misalignment with the textile to cause secondary transfer ghosting. After the transfer, if the put on the fabric is shed with water, it can be wiped off with water.
③ Whitewash method. If the transfer paper is larger than the cloth as well as can conceal the clothes look, the paper and towel are usually not gobbled by the warm pushing plate. This is due to the fact that the physical aspect of being gobbled is the electrostatic impact of the cloth. When the paper covers the cloth, the paper obstructed the electrostatic impact from the fabric. As a result, the textile will certainly not suck up and also diminish the secondary transfer.
④ Usage of unique adhesive transfer paper. It is the best way to avoid ghosting from using unique adhesive transfer paper. The adhesive transfer paper will be pasted with the material during transfer, to make sure that no matter how the paper and material are gobbled and also down, the paper and also material will constantly stick together. At the same time, the possibility of moving as well as ghosting is gotten rid of, and also the selection of glue paper can significantly boost the comfort of operation and also the pass price of mass production.
Side ghosting describes the fact that superficial shadows appear on the left and appropriate sides of the dots’ axis or lines, as well as their positions, are reasonably taken care of.
The thrust bearing of the roll to roll heat transfer calender countered printing cylinder is a component to stop the cylinder’s axial motion. If the thrust bearing is put on or loosened up, there is a space, under the action of the axial thrust of the helical gear, the cylinder will certainly relocate series to create straight ghosting, multi-color. The machine’s axial fine-tuning mechanism hangs, as well as the bearings are worn out, which will certainly cause the printing plate cylinder as well as the covering cylindrical tube to create relative axial variation under the regular functioning condition of the printing press, thus creating side ghosting. Service: Focus on the upkeep of the printing machine at regular times, and it can be prevented if the bearings with severe wear are discovered to be replaced in time.
This kind of failure is generally because of the imprecise paper transfer brought on by the squeegee’s axial activity, which causes ghost pictures. Remedy: Change the space in between the limited ring at both ends of the roller gripper shaft as well as the sleeve’s end surface area.
As a result of the lotus leaf paper’s lengthy paper edge, under the printing pressure of the initial shade, it presses to the routing edge as well as gradually relocates inward. When the first shade is pushed into the second shade, it was originally squeezed by the initial color. Journalism paper is released once again. This folding and also release quantity is arbitrary, resulting in the imprint of the previous covering continuing to be on the next device and the present imprint not being entirely overlapped, triggering ghosting This type of ghosting primarily occurs in both edges of the routing edge of the initial shade, and also there is no center. The solution: air-dry the paper to make the paper smoother before printing.
Longitudinal ghosting describes the fact that the shallow darkness shows up in the front and also back of the dots or lines in the axial instructions, as well as their settings are taken care of. The ghosts can be light or heavy, separated right into the partial and whole design.
Mean the pressure in between the rollers is as well large or the roller radius is not set up properly. In that instance, the rubber towel will certainly have a big variation under the action of the rubbing of the imprinting surface area, as well as it can not be totally reset after each transfer, leading to ghost pictures. Option: Fairly adjust the lining data of the printing plate cylinder and covering cylinder to make them fulfill the demands of synchronous rolling, under the property of guaranteeing ink transfer, minimize printing pressure.
The blanket of rotary heat transfer calender is not tightly extended, the displacement is huge throughout the moving procedure, and also can not be reset by the tightening pressure, there are 2 scenarios when the covering is not firmly stretched: one is that the total stretch is not tight, creating a big location of the ghost; The second is that the blanket is reduced manipulated or the iron splint is not correctly fashioned, causing partial tension as well as partial ghosting. This type of ghosting primarily happens in the tracking component. Normally, the ghosting just occurs in the very first lots of sheets. Service: If the blanket is not limited as a whole, simply re-tighten; if the part is not tight, inspect whether the covering is cut manipulated, or not mounted effectively, find out the factor, and fix it.
Remedy: Tighten up the printing plate; if the printing plate is cracked, you require to change the home plate.
Uneven ghosting describes the imprint ghosting (neither straight ghosting neither longitudinal ghosting) that takes place when double-diameter cylinder balanced out printing presses are in continual operation. Uneven ghosting is because of the printing press itself as well as the printing process’s procedure. The major factor for the machine is the not enough setup precision of the two pairs of double-diameter rollers. The printing process procedure troubles are mainly due to the deterioration of the tooth pads that have been made use of for a very long time, as well as the accuracy is reduced. Pay much more attention to the device’s upkeep at average times to keep the device in an excellent running state, the ghosting scenario will certainly be managed, and also the quality of the printed item will be boosted.
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We will want to consider a rotary heat press calender which can offer much faster production speeds when our sublimation printing operation is geared more towards high volume printing of textiles, sports- and fashionwear, or we wish to print long lengths of the substrate (for example, banners and flags). And today’s blog will introduce the science behind the industrial heat press machine.
Rotary press machines have a cylindrical felt covered drum, which is filled with oil. The oil is heated to the required temperature (200°C) creating an even and stable heat across the entire width of the drum. For roll-to-roll printing, rolls of the substrate and printed transfer paper are transported together around the heated drum, remaining in contact with the drum for a given length of time. A roller is used to apply tension to the tubular felt, which in turn applies pressure to the substrate and paper, holding it against the heated drum to facilitate the sublimation process. Separate rollers may also transport ‘protection paper’, which is used to prevent any excess gas that doesn’t sublimate into the substrate from transferring to the felt on the drum, (which could lead to the unwanted transfer of the dye back onto the roll of the substrate).
Standard features of an industrial heat press machine from Sublistar, are likely to include a fabric unwinder, tensioning device, contact-winder for the printed substrate, an unwinder and winder for the printed paper, and an unwinder and winder for the protection paper, plus a built-in cool-down timer, which also increases productivity.
For further information and more specific advice on the available rotary heat press calender options for wide format dye sublimation printing, or to arrange a demonstration, please contact us. Our team will provide you with the best service and products. Thank you for your reading.
As we all known, the price of a rotary heat press calender always is expensive, which is a high grade heat transfer printing equipment that plays an important role in the process of sublimation printing, so we need to pay attention to maintain it correctly. Today’s article will share you how to maintain a calender. 🙂
1. Remember to keep your heat press clean, this is basic, and also important.
2. Check every part of the heat transfer machine regularly to make sure they can work normally.
3. Each time before you start operating, remember the machine must be refueling according to the rules.
4. The roller heat press machine on the gas source processor, should close the gas 2 times a day; aerosol oil, adjusted to 4-5 drops per minute, and in the refueling to gas.
5. Joint head: drops of butter (a week / time, 10-20g), oil (1-2 drops, 3 days / times).
6. Be careful when pressing the emergency stop button. Often use this button is harmful for the chain, towline and the belt.
7. Sometimes the optical axis will drop oil twice a week. The best method to avoid this situation is using the good quality media.
8. When cleaning of the table glue, we should avoid table adhesive to the end of the wheel. If you find that the end of the wheel sticky plastic, dry wipe it, or it will influence the transfer printing result.
Our company, Sublicalender, is a machine manufacturer with over 10 years of experience producing rotary heat press calender. Our team utilizes the knowledge and experience obtained through years of involvement and puts it into research & development, innovation and design. We are supplier of other material of sublimation transfer printing as well. Any question, please contact us,?we will provide you the best service. Today’s share is here, thank you for your reading and have a nice weekend! 🙂