Printing is accomplished by silicon rubber into a
printing head steel plate ( or photosensitive plastic gravure ) on the image
transfer printing to the substrate, can be used to print or forming a variety of
printing, such as glass products, plastic products, metal products, watches and
electronic, optical products. Its main characteristic is the irregular shaped
convex surface printing. These printed using other printing methods is difficult
or even impossible, but the printing can be performed easily, and can achieve
multicolor printing. The instruments, equipment and some small products surface
printing, is the ideal mode of printing.
Printing and screen printing has many similarities, for
example, on a wide range of substrate; a wide variety of printing inks, printing
ink and printing ink basically can be universal; through the fixture and plates
can be very easy to complete different products such as printing. So, in many
occasions in printing and printing screen printing is like a pair of twin
sisters together, together play the important role of special printing
technology. Because of this, many experts have put into the printing printing
screen printing field, but not subdivided specialized printing technology and
research institutions. However, printing and screen printing characteristics and
use of technology still has certain difference. First of all, from the printing
process, printing and screen printing has the obvious difference; printing
machine and printing machines structure is not the same; printing technology to
adapt to the variety of products and screen printing can be quite different.
From an objective point of view, printing and screen printing differences than
similarities between them, and the habit of tying them together, the greater is
the cause of printing and screen printing is in the face of a common market, in
the common market, can not be separated from the printing screen printing. From
the screenprinting strip printing more difficult, also not necessary, but should
have a deep understanding of printing technology can not only to screen printing
industry vision to look at it.
To sum
up, the printing of the main features of a:
( 1) suitable for surface printing, elastic silicon
rubber pad for the plane two, three curved, concave and convex surfaces and
other complex shape of the substrate can be printed;
( 2) to print more sophisticated graphics, can be
printed 0.05 mm thread;
( 3) a stable
printing continued, even after a long time of printing, the printing precision
does not change;
( 4) eliminates the
drying process, continuous multi-color printing;
( 5) printing range, available in plastic, metal,
ceramic, glass, leather, bakelite and other material products of arbitrary
convex surface accurately monochrome, two-color, color graphic printing, can
also carry out soft contact printing, but also in the soft goods ( such as
fruits, cakes, eggs and so on ) as well as fragile fragile items ( such as
ceramics, glass products etc. ) on printing;
( 6) printing process simple operation and reliable
running, no special esoteric technique.
Screen printing process is the ink through the mesh
screen portion after the stencil on the substrate, the remaining part of the
mesh screen is blocked, the ink penetration. This part also in the substrate to
form blank. A printing ink in screen printing ink, in under the action of the
external force can not be through the mesh leakage to the substrate, and when
the scraper to certain pressure and tilt angle of scraping ink through the
screen, it is transferred to the substrate so as to realize image
copy.
Screen printing has the following
characteristics:
1, the substrate is
wide: due to the printing plate made by silk, soft and elastic, so the substrate
for flat or curved, hard or soft, big or small can be printed. In addition, silk
screen because of the pressure of small can also be printed on the fragile
substrate deformation.
In 2, the ink
layer thick and strong hiding power: screen printing ink layer thick, is other
printing methods there is nothing comparable to this. As with a white cover the
following background, using ordinary printing methods at the same site printed 3
to 4 times, and screen printing can be completed once. Screen printing ink layer
thickness 20 microns, special thick film printed up to 100 micron, the thinnest
also has 6 micron. So the screen printing ink layer thick and large adjustable
range.
3, strong stereo perception:
because the ink thickness, so in imitation of prints and copy the painting when
the effect is very lifelike, the color is more than offset printing; but in a
fine pattern printing, reproduction is limited.
4, good light resistance : the printing ink in the
redeployment of light pigment and fluorescent pigments, printing patterns can
permanently keep gloss without air temperature and sunlight conditions, even can
shine at night. Therefore, silk screen products suitable for outdoor
advertising, signs etc..
In 5, the
applicable ink quite extensive: water-based, oil-based, solvent base, and even
can be used slurry, paste, powder, so the screen printing ink collectively
printing material.
In 6, large format:
in the printing area, general offset printing, letterpress and other methods due
to machinery and equipment limited and far less than screen printing. Screen
format has reached the maximum 3M * 4M even more.
In 7, the plate has large flexibility: screen material
is decided by the characteristics of the plate will have greater scalability.
When used for mass printing, easy stretch plate will influence the replication
effect.
