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     SPECIAL LACQUERS

   Conference on liquid lamination Warsaw 2008
   General  description of Prim Jet Color's lacquers
   Protective properties of standard lacquer Top Coat
   Other properties of lacquer Top Coat
   Range of lacquers Top Coat
   Practical applications group of lacquers Top Coat
   Sample direction for use of lacquer Top Coat
   Division of lacquers Pre-Coat
   Lacquer Top Coat - technical data
   Lacquer Pre-Coat - technical data
   Comparison of accessible products in the market
   Application of nanotechnology in lacquer Top Coat
   Results of lacquer Top Coat light-fastness tests

 

 

GENERAL DESCRIPTION OF Prim Jet Color's LACQUERS

 

 

PRIM JET COLOR’S LACQUERS ARE WATER-BASED LACQUERS

 

They will not contain harmful organic solvents

 

 

USING OF PRIM JET COLOR’S LACQUERS
   

Lacquer can be applied by using compressed air (by paint-gun), by roller for dense acrylic lacquer or by laminator

 

 

PRODUCTIVITY OF PRIM JET COLOR’S LACQUERS
 

Using roller for dense acrylic lacquer one can cover with lacquer Top Coat or Pre-Coat up to
20 m2 area. Using paint-gun or laminator the coated by lacquer area can be about 30 m2

 

 

RECOMMENDED LACQUER FILM THICKNESS AND TEMPERATURE
   

  Standard thickness of lacquer film on a printout is about 30 μm. On flexible media (e.g. flags,
  T-shirts) we recommend the value 20 μm as a proper film thickness

   

  An operating range of temperatures for coated by lacquer Top Coat printout is from −40°C
  to +60°C. The lacquer Top Coat should be store in cool dry place in encapsulated containers
  (not below +5°C)

 

 

UNIQUE PROPERTIES OF PRIM JET COLOR’S LACQUERS

  Lacquer Top Coat protects printouts made on appropriate media using dye/pigmented water-
  based, solvent, UV-curing inkjet ink or serigraphy etc.
  Lacquer Top Coat protects also printouts made on an ordinary paper (xerographic)

 

Firm Prim Jet Color

closely co-operates with the Customers

for the purpose of the adaptation of lacquer composition

to the Customers individual demands and the needs


 

 

PROTECTIVE PROPERTIES OF STANDARD PRIM JET COLOR’S LACQUER TOP COAT

 

  Lacquer Top Coat  can be applied by using com-
  pressed air (by a paint-gun), by a roller for dense
  acrylic lacquer or by laminator

 

  Lacquer Top Coat is waterproof that is why
  protects printouts against moisture and rainfall

 

 

  Lacquer Top Coat protects printouts against harm-
  ful UV radiation

    Lacquer Top Coat protects printouts against
  environmental pollution

 

 

  Lacquer Top Coat protects printouts against ageing

    Lacquer Top Coat protects printouts against acid
  rain

 

 

  Lacquer Top Coat  protects printouts against
  scratches

    Lacquer Top Coat protects printouts against
  mechanical damages

 

 

 MAKING PRINTOUT MATT, SATIN OR GLOSS*

matt satin gloss

  Appropriate lacquer Top Coat gives to printout required level of full gloss

*Some lacquers, containing specific components, e.g. components suitable for reinforced scratch/UV resistance, are not giving gloss printout’s surface. In this case to get a gloss surface of printout we recommend to put additionally one more lacquer’s layer using standard gloss lacquer Top Coat.

 

INTENSIFY PRINTOUT’S COLORS

 

 1

 On banner or other media e.g. paper is printed
 any picture
  2   Printout on banner not coated by lacquer
  Top Coat

 

 

3  Lacquer Top Coat  can be applied using a roller
 for acrylic lacquer or a paint gun
  4  Printout coated by lacquer Top Coat is more
 expressive and with vivid colors

 

 

RANGE OF LACQUERS TOP COAT

LACQUER TOP COAT No. 1

  Lacquers protect printouts against harmful UV radiation, environmental pollution, acid rain and mecha-
  nical damages. Lacquers differ in the lengths of time interval of effective UV protection.

  We recommend using of lacquer Top Coat Standard indoor, lacquers Top Coat Improved and Exten-
 
ded outdoor or for exposition near strong artificial light sources, respectively.

  It is difficult if not impossible to accurately predict how long coatings will last based on accelerated
  exposure data as it depends “where” you are in the world and how the panel is exposed (i.e. North,
  South facing & horizontal, vertical or 45 degree pitch etc.). What can be stated with certainty is that
  products showing better durability on QUV testing will perform better on exterior exposure.

LACQUER TOP COAT No. 2

LACQUER TOP COAT No. 3

 

  Extended printouts protection against scratches

    Increased printouts protection against alga, mould
  and mushroom

LACQUER TOP COAT No. 4

LACQUER TOP COAT No. 5

 

  Lacquer makes migration of plasticizers impos-
  sible. A sign of this migration is „wet” and sticky
  printout surface

    Special lacquer for flexible media protection
  (e.g. flags)

 

 

PRACTICAL APPLICATION GROUP OF LACQUERS TOP COAT

 

  Printouts stuck on a body of a car or tarpau-
  lin protection
against environmental pollutants,
  harmful weather conditions and UV radiation

    Banners protection against environmental
  pollutants, harmful weather conditions and UV
  radiation
     

 

  Flag protection against environmental pollutants,
  harmful weather conditions and UV radiation

    Ceramic tiles protection against alga, mould,
  mushroom, harmful weather conditions and UV
  radiation
     

 

  Sculpture protection against alga, mould, mush-
  room, harmful weather conditions and UV radiation

    Any kind of printouts on brass protection
  against scratches, harmful weather conditions
  and UV radiation
     

 

  Any kind of printouts on stone protection
  against scratches, harmful weather conditions
  and UV radiation

 

  Printouts on stone and stone panels prote-
  ction
against alga, mushroom, harmful weather
  conditions and UV radiation

     

 

  A beer mat protection against scratches, des-
  tructive fluids influence and UV radiation

 

  Painting, photo, image protection against
  whitening, scratches, moisture and UV radiation

     

 

  Important documents protection against
  whitening, scratches, moisture and UV radiation

    Puzzles protection against whitening, scrat-
  ches, moisture and UV radiation
     

 

  Any kind of printouts on wood protection
  against scratches, harmful weather conditions
  and UV radiation

    Any kind of printouts on hard PVC protec-
  tion
against scratches, harmful weather condi-
  tions and UV radiation
     

 

  Any kind of printouts on aluminum prote-
  ction
against scratches, harmful weather condi-
  tions and UV radiation

    Wooden floor protection against scratches,
  moisture, harmful weather conditions and UV
  radiation
     

 

  Siding (facade) protection against scratches,
  harmful weather conditions and UV radiation

    Printouts on ceramic tiles protection
  against cleaning agents, scratches, moisture
  and UV radiation

 

 

SAMPLE DIRECTIONS FOR USE OF LACQUER TOP COAT

 

 1

 Lacquer Top Coat protects printouts stuck on
 a metal body of big motor tracks or printed
 on tarpaulin
  2  The appropriate printout is applied on a body
 of a car

 

 

3

 Lacquer Top Coat  is applied by using com-
 pressed air (by paint-gun) or by a roller for
 dense acrylic lacquer

  4

 After drying, during 72 hours lacquer film
 on printout attains the best protective para-
 meters

     

 

5  Now printout is resistant to harmful UV radia-
 tion, environmental pollution, acid rain and
 mechanical damages
  6  Our firm’s motto:
 „We create our Customer’s satisfaction”

 

 

 DIVISION OF LACQUERS PRE-COAT

LACQUER PRE-COAT No. 1

  Prepares media for dye/pigmented solvent, UV-curing inkjet ink printing or serigraphy etc.

  Prepares media for dye/pigmented solvent, UV-curing inkjet ink printing or serigraphy etc.

 

 

Prepares media for dye/pigmented solvent, UV-curing inkjet ink printing or serigraphy etc.

LACQUER PRE-COAT No. 2

LACQUER PRE-COAT No. 3

 

  Enable sublimation transfer on textiles made
  from natural/artificial fibers, e.g. pure cotton

    Prepares media for sublimation onto flexible
  media, e.g. flags

 

LACQUER PRE-COAT No. 4

  Enable sublimation transfer onto special media

  Enable sublimation transfer onto special media

 

 

  Enable sublimation transfer onto special media

 

 

LACQUER TOP COAT - TECHNICAL DATA

 

 

    Lacquer Top Coat (patented in the end of 2006) is an universal water-soluble lacquer designed to laminate printouts. It is principally used to secure inkjet ink printouts against the harmful influence of ultra-violet UV radiation, mechanical damages and damages caused by industrial environmental pollution.

   Lacquer Top Coat is also applied to obtain a glossy and smooth surface of any printout, photograph, graphics and other artistic products, with their simultaneous self-protection against the influence of harmful weather conditions. Lacquer Top Coat protects printouts made on nearly all media, for example PVC, banners, canvas covers, tarpaulin, metal, glass, ceramics, stone and wood.

 

 

Lacquer Top Coat

Product Description

Characteristics

  • Lacquer Top Coat  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 matt, satin or gloss layer on the printout.

  • The lacquer was designed using latest technologies, to obtain perfect resistance of coated by lacquer printouts against UV radiation, large temperature fluctuations, wind, a sand in the air carried by wind, fog, salt, 5% of the hydrochloric acid HCl and 5% sulfuric acid H2SO4, 40% ethyl alcohol and nitrogen dioxide in the atmosphere, respectively.

Technical data

  • Drying time is out about 30 minutes in the temperature 20ºC (depending on the kind of coated surface), on the free air.

    This time is long enough, that on a coated by lacquer flexible wide format printout, rising during the drying process lacquer film receives the shape of printout basis and undergoes such deformations as basis. Thanks to this feature do not appear the cracks, bulge or other faults connected with the maladjustment created coatings with printout basis (media).

    Entire time of polymerization carries out 72 hours and after this time the product has full protecting properties.

  • Tests proved that the lacquer Top Coat increases resistance to UV radiation inkjet ink printouts about 18 months up to 5 years (depending on the kind of lacquer). It also protects printouts against mechanical damages.

  • Lacquer Top Coat widens gamut of colors of the printout, which seems to be more expressive and sharp.

  • Lacquer Top Coat does not alter color (it does not become yellow).

Remarks

  • Lacquer Top Coat should be protect against low temperature.

  • We recommend putting the lacquer on using compressed air (by paint-gun), by laminator or by a roller for dense acrylic lacquer.

  • Up to now, how it follows from carried out tests, it is possible to cover by lacquer Top Coat printouts made using each kind of ink and on each kind of surface. However user ought to carry out checking tests just to be sure.

Health and safety

  • Lacquer Top Coat is odorless

Natural environment

  • Lacquer Top Coat fulfills all ecological requirements (in accordance with the appropriate using)

Storage

  • Lacquer Top Coat ought to be kept in the cool dry place (not under +5ºC) in the hermetically closed containers. Avoid lacquer from direct sun exposition.


 

 

Comparison of UV resistance of two plotter printouts made using water-based pigmented ink on a Blue Back paper exposed outdoor together during 6 month in Tunisia (tests was carried out by firm WELLCOM, wellcom@topnet.tn). Upper printout was covered by Improved lacquer Top Coat.  Colors on unprotected by lacquer printout faded. Black color lost about 12 % of intensity, red color – about 30% and yellow color- about 50%, respectively.
Coca-Cola logo is registered trade mark of The Coca-Cola Company in USA and other countries.

 

 

Sample printout made on wide format plotter using pigmented water-based ink on a Blue Back paper. The right picture was coated by lacquer Top Coat.

 

 

 

    Lacquer Top Coat is produced in three versions: matt, satin and gloss. Softer version – satin, is better for example to cover flags, but gloss version has better mechanical scratch resistance.

 

    Moreover lacquer Top Coat is also produced in the version making impossible migration of plasticizers from the depth of the media, on which printout was made, to its surface. This migration process usually manifests as wet, sticking itself surface of printout, particularly when it was made on a cheap PVC media.

 

   A good solution appears to be printing using dye water-based ink and then protection of printout by lacquer Top Coat.

 

   It is worth to turn attention on the fact, that the cost of coating printout by lacquer Top Coat is about 1 € ($ 1.4) for square meter, while using cheapest lamination film, it is a great deal more. Moreover surface protected by lacquer Top Coat has higher technical resistance parameters, than this coated by lamination film during the lamination process.

 

    Lacquer Top Coat can be applied in hard to access places, for example on printouts made on a body of a big motor track.

 

 

 

 

Sample printout made using dye water-based ink on a standard paper. Upper picture was coated by lacquer Top Coat.  

 

 

Sample printouts made using dye water-based ink on an ordinary paper. Upper pictures were coated by lacquer Top Coat.

 

 

Sample printouts made using dye water-based ink on an ordinary paper. Upper pictures were coated by lacquer Top Coat.

 

 

LACQUER PRE-COAT - TECHNICAL DATA

 

 

   Firm Prim Jet Color produces various kinds of lacquers (patented in the end of 2006), under the common name Pre-Coat, designed for the initial preparation of the media’s surface on which has to be made printout.

   Lacquer Pre-Coat contains additional nano-components increasing printouts resistance to the UV radiation.

 

 

Lacquer Pre-Coat

Product Description

Application

  • Lacquer Pre-Coat No. 1: prepares media for solvent inkjet ink printing on stone, wood, metal, paper, glass, PVC, ceramics.

  • Lacquer Pre-Coat No. 2:  prepares base for sublimation transfer on a cotton and other natural fibers (silk, flax, wool).

  • Lacquer Pre-Coat No. 3: prepares media for direct printing or for sublimation transfer on flexible media e.g. flags.

  • Lacquer Pre-Coat No. 4: prepares base for sublimation transfer on metal, ceramics, stone, wood, glass, paper, PVC etc.

Characteristics

  • Lacquer Pre-Coat  is prepared on the basis of water acrylic dispersion.

  • Lacquer Pre-Coat contains additional nano-components increasing printouts resistance to the UV radiation.

Technical data

  • Drying time is out about 30 minutes in the temperature 20ºC (depending on the kind of coated surface), on the free air.

  • Lacquer on ceramics (Pre-Coat No. 4 ) is made out from 100 parts of sublimable lacquer (white color) and 25 parts of lacquer in bronze color (hardener), for example 100 ml lacquer + 25 ml hardener, and after mixing lacquer is ready to cover flat surface under printout. After drying of coated surface it is necessary to wait 24 hours, in order to obtain the best parameters of the coated layer (for sublimation transfer).

  • Lacquer on metal (Pre-Coat No. 4 ) is made out from 100 parts of sublimable lacquer (white color) and 26 parts of lacquer in bronze color (hardener).

Remarks

  • Lacquer Pre-Coat should be protect against low temperature.

  • We recommend putting the lacquer on using compressed air (by paint-gun), by laminator or by a roller for dense acrylic lacquer.

  • Some customers warm coated objects for about 6 minutes in the tempe-rature from the interval 180ºC - 200ºC. It is necessary to test this pro-cedure, to obtain expected effect using a specific kind of paper to the sublimation transfer, a specific press and SPECIFIC CERAMICS or other media.

Health and safety

  • Lacquer Pre-Coat is odorless.

Natural environment

  • Lacquer Pre-Coat fulfills all ecological requirements (in accordance with the appropriate using).

Storage

  • Lacquer Pre-Coat ought to be kept in the cool dry place (not under +5ºC) in the hermetically closed containers. Avoid lacquer from direct sun exposition.


 

 

 

    Lacquer Pre-Coat No.2, which prepares cotton fabrics and other natural fibers to receive the sublimable transfer, ought to completely cover suitable surfaces under printout.

 

   Usually surface for sublimable transfer is coated by lacquer Pre-Coat No.2 using a sieve to serigraphy (this way gives most steady layer), by a roller for dense acrylic lacquer or with help of a paint-gun.

 

   Correctly impregnated surface ought to dry. It is possible to dry it faster using hairdryer or placing fabric under press warmed to about 160ºC. Distance from heat source ought to be about 3 cm. We suggest to carry out own tests of the technology of the sublimable transfer.

 

  Usually the temperature of sublimable transfer ought to be about 170ºC and transfer ought to go on about 30 seconds.

 

 

 

 

Sample printout (the sublimation) on a cotton initially prepared by lacquer Pre-Coat No. 2.  

 

 

Sample printout made on thick hard PVC using solvent ink and lacquer Pre-Coat No. 1 for initial media preparation. Sample sublimation transfer on ceramic tiles enabled by using lacquer Pre-Coat No. 4 for initial media preparation.

 

 

COMPARISON OF ACCESSIBLE PRODUCTS IN THE MARKET

 

 

   On the drawing below are presented printouts coated by different lacquers accessible on the market. The drawings are made using dye water-based ink on an ordinary (xerographic) paper.

 

Smudges on the left drawing show that lacquer 1 (from other firm) is not waterproof. However on the right drawing it is possible to notice the significant change of colors of coated by lacquer 1 printout.

 

 

Lacquer 2 from a next firm causes the whitening of colors on a printout.   Just as lacquer 1 also lacquer 3 is not waterproof.

 

 

 

On the drawing is illustrated the influence of lacquer coating on printout’s colors. All printouts was made using dye water-based ink on an ordinary paper. Lacquer 2 and lacquer 4 causes the whitening of colors on the printout. Lacquer Top Coat will keep colors, and a gamut of colors on the printout coated by lacquer Top Coat is the closest to the original picture.

 

 

On the drawing is shown the lacquer 3 and 4 influence on colors of dye water-based ink printout. One can see spreading of lacquer 3 what is visible as thick layers on a printout. Lacquer 4 is “dragging” colors and appears fat smudges on printout.

 

 

   It is worth to note that lacquer Top Coat, contrary to other mentioned above lacquers available on the market (brought from abroad:  Italy, Great Britain, USA), is a water-based lacquer.  It is ecological product without harmful organic solvents.

 

 

 

APPLICATION OF NANO-TECHNOLOGY IN LACQUER TOP COAT*

 

 

 

   All included in this paragraph results of scientific investigation and measurements concerning ZnO as a UV-blocker was obtained by the firm Advanced Nanotechnology Limited, Australia.
 

   The lacquer Top Coat contains zinc oxide ZnO as an optically active substance to reduce the unwanted influence of ultraviolet radiation on the printout made using dye or pigmented water-based, solvent inkjet ink, sublimation transfer, serigraphy, etc.. On the printout not coated by lacquer Top Coat one can observe fading of colors and yellowing of white parts of printout over time.
 

   Zinc oxide

  • This product has true broad spectrum absorption and absorbs both UV B and UV A light. It is photostable and UV absorption does not decrease over time.

  • It is a low irritant/allergenic substance and has a long history of use in coatings.

  • It is a natural antifungal and has a good public perception since it has long been used in cosmetics.

   There are problems with other inorganic absorbers. Coating acceptability limits the amount of inorganic that can be used. Formulations are limited in the amount of Fe2O3 or TiO2 than can be used without causing color or whiteness problems.

 

    Photons, the quanta of light, are either specularly or diffusely reflected, absorbed or pass through the coating. Diffuse scattering causes whitening. The intensity of diffuse scattered light is proportional to third power of UV-blocker particle’s diameter.


    According to the above remarks in the preparation of lacquer Top Coat our firm used a new generation ZnO nano-powder, to achieve the best protection against UV radiation without causing observable whitening.

 

   On the drawing below is presented the size distribution of the UV-blocker nanoparticles used in lacquer Top Coat  . It is evident that diffuse scattering of light can be neglected.

 

Picture of nano-powder ZnO used as UV-blocker in lacquer Top Coat.   Size distribution of nanoparticles in ZnO powder. Such distribution assures perfect properties of lacquer Top Coat.

 

   On the drawing below are presented transmittance curves of UV radiation through medium coated by lacquer with different UV-blockers (on the basis of zinc oxide ZnO) as a function of light wavelength. An ideal UV-blocker ought to block UV radiation in the range 200—400 nm, but visible light, 400 - 800 nm, should to be transmitted without loss of intensity. As is shown below, on the basis of transmittance measurements, the nano-powder used in lacquer Top Coat is a perfect component to protect printout without whitening effect.
 

On the drawing are presented transmittance curves of various UV-blockers (ZnO) versus light wavelength. In comparison with other products nano-powder used in lacquer Top Coat perfectly absorb harmful UV radiation in the range from 200 – to 370 nm, however visible light (400 – 800 nm) is transmitted without important loss of intensity. Thanks to this feature printout coated by lacquer Top Coat is not whitening.

 

In the above is presented schematic explanation of the mechanism of whitening of printouts, when in lacquer is applied inadequate UV-blocker based on the zinc oxide ZnO. Diffusion scattering of visible light of the large ZnO particles causes whitening of printout, and also UV radiation is not sufficiently blocked. In contrast to this the printout coated by lacquer Top Coat shows the printout is not whitened, because the nanoparticles of ZnO do not cause significant diffuse scattering  of light moreover UV radiation is perfectly blocked.

 

The quality of blocking the UV radiation by nano-ZnO molecules proves the plot of transparency as a function of wavelengths. Nano-blocker applied in lacquer Top Coat is characterized by the real broad band of the absorption both of radiance UV B and UV A

 

 

   Lacquer Top Coat, as an universal lacquer can not only be used to protect inkjet ink printouts, but also to protect any kind of printout on special media like for example tiles in bathroom, glass, metal, stone, wood and other objects under direct UV radiation.

   A good example can be photographs below showing the influence of UV radiation on wood.

 

The influence of UV radiation on wood coated by water-soluble lacquer without and with UV-blocker (on the basis of zinc oxide powder). After 1500 hours of QUV exposure (UVA) it is easy to see a big difference between protected by zinc oxide surface and not protected one.

 

   It is difficult if not impossible to accurately predict how long coatings will last based on accelerated exposure data as it depends “where” you are in the world and how the panel is exposed (i.e. North, South facing & horizontal, vertical or 45 degree pitch etc.). What can be stated with certainty is that products showing better durability on QUV testing will perform better on exterior exposure.

 

* In lacquer Top Coat is used as a nano-blocker zinc oxide ZnO produced by the firm Advanced Nanotechnology Limited, Australia

 

 

RESULTS OF  LACQUER TOP COAT LIGHT-FASTNESS TESTS

 

 

 PIGMENTED INK

 

 

The QUV exposure tests of water-based pigmented ink printouts made on photographic paper were performed in Advance Nanotechnology Limited Laboratory. The printouts were coated using various kind of lacquer Top Coat. The results of changes in printouts color after 2000 hours of QUV340 lamp exposure are as follows:

 

 

The numerical results presented in table above are obtained according to CIE Lab color system L a*b*.
L defines lightness, a* denotes the red/green value and b* the yellow/blue value.

 

 

In the table above are shown pictures of uncoated pigmented ink printout and printouts coated using various kind of lacquer Top Coat, respectively. Uncoated panel after 200 hours of QUV exposure is completely faded. The printout protected by Ultra Extended lacquer Top Coat is stable, the attributes of printouts color are nearly the same as those of uncoated panel before tests.  Detailed results of QUV tests are placed in the file uv tests pigmented ink 2008.pdf

 

 

 DYE INK

 

 

The QUV exposure tests of water-based dye ink printouts made on photographic paper were performed in Advance Nanotechnology Limited Laboratory. The printouts were coated using various kind of lacquer Top Coat. The results of changes in printouts color after 200 hours of QUV340 lamp exposure are as follows:
 

 

The numerical results presented in table above are obtained according to CIE Lab color system L a*b*.
L defines lightness, a* denotes the red/green value and b* the yellow/blue value.

 

 

In the table above are shown pictures of uncoated dye ink printout and printouts coated using various kind of lacquer Top Coat, respectively. Uncoated panel after 200 hours of QUV exposure is completely faded. The printout protected by Ultra Extended lacquer Top Coat is stable, the attributes of printouts color are nearly the same as those of uncoated panel before tests.  Detailed results of QUV tests are placed in the file uv tests dye ink 2008.pdf

 

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