After the Flat Screen Printing Machine prints the colorful pattern design, in order to achieve the unique high-brightness actual effect or increase the shelf life of the pattern design, varnish must be used. Varnish is a professional post-printing process. It is equipped with decorative design prints to make the surface of packaging and printing objects smooth and clean, avoiding the fading of the pattern design, showing the thickness of the protective layer to maintain the object, improving moisture resistance, weather resistance, scratch resistance, etc. The efficacy of sex. That is, it can be sprayed with the Flat Screen Printing Machine nozzle, and it can also be sprayed with a professional spray gun or shower. If the varnish is operated incorrectly, there will be blistering, melting, etc. What are the reasons for this? How to solve it?
There are the following types of Flat Screen Printing Machine spray paint varnishing oil bubbles:
1. The architectural paint and thinner in the varnish are mixed with water when prepared.
2. Excessive use of paint thinner when glazing oil is diluting liquid;
3. The surface of the printed block is not smooth, the light oil intake is large, and the coating is too thin;
4. The surface of the printed object is wet, cold, dirty, with moisture, acid, salt, alkali and other chemical substances;
5. The relative humidity of the air on the spot exceeds 90%, causing the coating to become white and lose gloss;
6. The temperature on the spot is too low, drying is slow, and moisture accumulates on the surface, causing loss of gloss.
For the above reasons for the foaming of various varnishes, the flat screen printing machine varnishing solutions include the following categories:
1. Normally store the architectural paint properly to avoid infiltration of water;
2. Pay attention to adjusting the proportion of preparation. The proportion of preparation in each varnish is different. It must be prepared in strict accordance with the operation process and proportion regulations of the Flat Screen Printing Machine manufacturer;
3. For non-smooth printed objects, increase the demand for varnish;
4. Before applying the Flat Screen Printing Machine to spray varnish, carefully clean the surface of the printed object without any residue;
5. Adjust the relative humidity of the air well, preferably between 25% and 80%;
6. Adjust and manipulate the room temperature, preferably in the middle of 20°-40°.
Flat Screen Printing Machine can print varnish, but here it is not recommended to use Flat Screen Printing Machine varnish.
Flat Screen Printing Machine nozzle does not spray varnish. One:
The speed is very slow. According to specific inspections, the varnish is uneven, and the speed is less than two square meters in one hour, and the varnish is very expensive. Conversely, using the oil spray gun independently, the speed is increased by more than five times, and the spray is average and detailed.
The flat screen printing machine nozzle does not spray varnish. Two:
The print head is damaged too early. The varnish itself is larger than the molecular structure of the ink. If you use the print head to polish the oil, the traditional estimation will reduce the service life of the print head by one third. If the actual operation is not good, it will not come out. In a week, the nozzle will be damaged.
The nozzle of Flat Screen Printing Machine does not spray varnish for three reasons:
The cost is too high. If the Flat Screen Printing Machine itself needs to add varnish, a new ink pump system software must be installed for it. The main control board, mobile phone software settings, working voltage, ink tube must be installed at these stages. Replacement again, this invisibly increases the cost of up to 20% for the customer.
In our usual production and manufacturing work, if we want to obtain more satisfactory and expressive printed matter, we must grasp the technicality of varnish. Only by grasping the technology of Stenter varnish can we meet the requirements of a large number of customers stronger, enhance our competitiveness, and quickly occupy the market.