Monochrome offset press selection standard

A monochrome offset press, as its name suggests, can only print one color at a time.

There is a certain difference between the selection of printing supplies for monochrome offset printing presses and multi-color offset printing presses. Multi-color offset press In general, the requirements for the selection of consumables are high, and the monochrome is relatively free.

In fact, the choice of printing consumables, from the perspective of cost, quality, cost-effectiveness, etc., should be more cautious. Here briefly talk about the choice of monochrome offset printing supplies.

First of all, the only consumable item that Federa needs to purchase frequently is the mouthpiece skin. The mouthpiece skin is generally of three thicknesses: thick, plain, and thin.

Generally speaking, these three thicknesses can adapt to various types of paper. Even with the thinnest mouthpiece, the thickest paper has no problem. Of course, during the paper feeding process, there may be cases where the paper cannot be sucked. It can be compensated by adjusting the height of the suction nozzle and the suction volume.

Personal recommendation: Ordinary mouthpieces, a relatively wide range of adaptation. Prices range from 0.3 yuan to 1 yuan per piece.

The brush wheel and line belt on the cardboard table need to be selected according to the actual situation. The personal recommendation of the hair wheel is smaller, because the smaller hair wheel deformation is also relatively small, so that the stability of the paper is more stable. good.

The choice of ink is of utmost importance. There are more manufacturers of peony for monochrome ink and peony is one of the most cost-effective inks. Its performance is also one of the most stable inks. Old brands, big brands, trustworthy. Another reason is that there are relatively many suppliers of peony, fierce price competition, and limited profits. This is one of the reasons why many printing companies have been following peony ink for years. Some other inks are also recommended here: Tianjin Tianshi, Shanghai Huaxing, Hangzhou Hanghua.

There are several types of ink accessories: ink additives, detackifiers, and transfer inks.

Under normal circumstances, the choice of oil varnish in many cases, inexpensive, de-adhesive and ink additives are relatively expensive, in the last resort, ink additives can be used instead of de-bonding agent, its efficacy is similar.

Wetting powder is more critical, and many printers think that the greater the amount of wetting powder, the better the printing effect is. The more the amount of wetting powder, the more easily the PS plate is burned. Although the wetting powder has a certain ability to prevent dirt, it is not a panacea. The main reason is to make the water fine and stabilize the surface tension of water. Makes the water messy.

Revision paste, revision fluid, revision pen to choose according to the circumstances, it is recommended to use printing plate revision room paste, machine selection revision pen.

There is a big difference in the price of cleaning paste and cleaning fluid. There is a way to save both materials. At the time of printing, we try to use sponge instead of cloth. The sponge has strong water absorption function. You can use a bucket, put the appropriate water on the edge of the machine, and soak the sponge in the plate every time. For a long time, the cleansing paste remaining on the sponge was also incorporated into the water. I personally saw a printing plant, a machine, and only used two boxes of cleansing paste in a month to reuse the water in the barrel every day. When you use water to smell stinky, you are willing to drain it.

Although this is very material-saving, it is better to be proper from the perspective of hygiene.

The selection of the ps version depends on the specific situation. Some enterprises only need to regenerate the version to complete the work, while some enterprises do not use the Huaguang version. In the case of large quantities, it is necessary to use a good plate, and the quantity is small. There are only a few thousand in each batch. The reproduction version is also a very good choice. After all, the printing quality requirements of monochrome printing machines are relatively low. Rubber blankets are still recommended for better personal use. For example, Dico in the United States and Vulcan in Italy are the best in the blankets. They can be used normally and they can be replaced in a few months, which is quite cost-effective. Of course, it is not ruled out that some companies print thick paper all year round and it is easy to wreck bad blankets. They can only use the domestic rubber.

Reducing agent generally divided into two kinds: one is to wash reducing agent, the reduction effect is not very good, basically a few dollars a bottle of a few dollars. One is a strong restore reducing agent, paste, the effect is good, the price between 60 and 80. This depends mainly on the price of the blanket, and sometimes a bottle of powerful reductant can be purchased for a new blanket.

There are also some auxiliary materials, here to recommend: idle protection agent, calcium removal agent, anti-skinning agent, car wash water and so on. The calcium removal agent is used to clear the crystal surface of the rubber roller, and the effect is good. After the use of the roller, the dirt on the surface of the roller can be effectively removed. If the surface of the roller is crystallized seriously, it needs to be removed and wiped with toluene. The use of anti-skinning agents can effectively save car wash water, which is not recommended. If the downtime exceeds 4 hours, it is recommended to wash the rubber.

The choice of dusting depends on the situation of the printed matter. Need to be finer, or coarse, depending on the amount of ink, the thickness of the paper, and the smoothness of the surface of the paper. If printing tray paper, you must choose environmentally friendly, non-toxic spray.