Lacquers Pre Coat
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Prim Jet Color produces various kinds of lacquers, under the common name Pre Coat, designed for the initial preparation of the media’s surface on which has to be made printout. Sublimation transfer on such media as glass, metal, ceramics, wood without activating their surface is impossible.
Chemical base
Efficiency
Recommended thickness
Lacquer Pre Coat 1
Prepares media for printing with solvent ink or UV-cured ink

Lacquer Pre Coat 1 is a universal water-soluble lacquer (primer) designed to enable digital inkjet printing (plotters, printers) on various media. First of all, it is designed to allow direct printing with solvent inks on such specific media as, for example, metal, glass and melamine. In the case of UV-cured ink printing, the adhesion of the ink to the lacquered surface is much higher than to the surface without the initial lacquer layer. The printout better holds the ground and is more resistant to mechanical damage. 
 
Pre Coat 1 can contain additional nano components that increase the resistance to UV radiation.
Lacquer Pre Coat 2
For sublimation transfer on natural fibers

Lacquer Pre Coat 2 prepares base for sublimation transfer on a cotton and other natural fibers (silk, linen, wool). It is prepared on the basis of water acrylic dispersion. The lacquer is water-soluble and after drying-time becomes waterproof. It creates a thin very elastic/flexible homogeneous, smooth layer on the media.

Lacquer Pre Coat 2, which prepares 100% cotton fabrics and other natural fibers for sublimation transfer, should completely cover the surface designated for printing (lacquer Pre Coat 2 should be accurately placed using, for example, appropriate forms, patterns in the place intended for printing). Usually the surface for sublimation transfer is coated with lacquer Pre Coat 2 using a sieve to serigraphy (this method provides the most uniform layer of lacquer), using a roller for dense acrylic paints or with the help of a compressed air gun.

Correctly coated surface should dry out. The drying process can be accelerated by curing the coated fabric using, for example, a hot air source or a press. We suggest carrying out own tests on how thick the lacquer Pre Coat 2 layer should be for the sublimation transfer to be optimal. Too thinly covered surface for printing causes that colors after sublimation are not sufficiently intense, while too thick layer of varnish stiffens the fabric and causes blurring of printouts (diffusion).

Too thin lacquer layer causes that colors after sublimation are not sufficiently intense, while too thick lacquer layer stiffens the fabric and causes blurring of the printout contours (diffusion).

It is necessary to wash the finished sublimation printing to make it flexible. After the sublimation transfer, the printout is permanent. However, the total polymerization process takes about 24 hours and after this time the durability of the printout is the highest.

In order to obtain very intensive colors and even greater durability of the printout, before the sublimation transfer, it is necessary to additionally to heat the Pre Coat 2 lacquered fabric (after drying) for 2 minutes at 160°C. The best results are obtained when the lacquer is applied by means of a sieve on a dense fabric.
Lacquer Pre Coat 4
For sublimation transfer on various (hard) media

A lacquer that allows sublimation transfer on rigid media (eg. ceramics, glass, metal, hard wood, etc.) and thick paper and cardboard is lacquer Pre Coat 4. 
Lacquer Pre Coat 4 was designed on the basis of an aqueous dispersion of polymer resin. The lacquer Pre Coat 4 and 25% hardener mixture is liquid under curing conditions. During curing it undergoes polyreactions leading to the formation of a solid cross-linked polymer. Lacquer Pre Coat 4 is water-soluble and after curing it becomes waterproof. It creates a very thin, transparent, homogeneous and smooth polymer layer on the surface of the media, enabling sublimation transfer.

Lacquer Pre Coat 4 after curing creates a surface with a high gloss, very good adhesion to the substrate, hard and flexible, resistant to abrasion, impact and other mechanical factors, and resistant to periodic exposure to strong chemicals. 
The addition of appropriate coloring pigments to the lacquer Pre Coat 4 gives the desired color of the coated surface. A typical example is the white lacquer Pre Coat 4 used for sublimation printouts containing white elements (there is no white sublimation ink). 

 For optimal results, we suggest you follow the instructions below:
  • Mix lacquer Pre Coat 4 with hardener very carefully, preferably in a blender with a spatula (eg 1 kg of varnish + 250 g of hardener). 
  • The ready-to-use lacquer should be homogeneous, without air bubbles. If air bubbles are observed in the volume of the mixture, they should be allowed to disappear. It should be remembered that the mixture of lacquer and hardener harden after about 3 hours irretrievably and turns into a solid state. 
  • The surface prepared for the initial coating with lacquer Pre Coat 4 should be dry, clean, degreased (stains, fingerprints), unformed. Extremely smooth surfaces should be slightly matted, for example with sandpaper. 
  • The lacquer can be applied using a laminator, a roller for thick acrylic paints or a compressed air gun. 
  • If the lacquer is too dense for the compressed air gun, it can be diluted with a small amount of distilled water. 
  • We recommend carrying out own tests on how thick the lacquer Pre Coat 4 layer should be. Too thin lacquer layer on the surface under the printout causes that sublimation colors are not sufficiently intense, while too thick lacquer layer causes blurring of the printout contours (diffusion).  
  • Initially, the coated surface is opaque, with a milky coloration. As water  evaporates, it becomes colorless, transparent (after about 30 minutes). 
  • After the surface has dried, the lacquer layer should be hardened by heating (because full cross-linking, i.e. curing of the polymer layer, lasts at room temperature of 20°C to 7 days). Any increase in the annealing temperature by 10-15°C results in a shortening of the hardening time by half. For example, at 90°C the heating time is 60 minutes, and at 100°C - 30 minutes etc.
  • After hardening of the lacquered surface, we recommend to wait about 2 hours for the sublimation transfer to ensure that the lacquer layer has optimal properties.
  • Graphics, which we intend to transfer to rigid, hard media (eg. ceramics, glass, metal, hard plastics), should be printed using sublimation ink on a special transfer paper, using a printer or plotter. Graphics that we intend to transfer to rigid, hard media (eg ceramics, glass, metal, hard plastics) should be printed using a printer or plotter with sublimation inks on a special transfer paper. This graphic is then transferred from paper to the coated surface by heating using a press or other sublimation device. Typically, the transfer temperature is between 190ºC and 210ºC, and transfer time from 30 seconds to 1 minute.