The decision to become ink manufacturer was driven by the need to achieve a product that truly distinguished itself on the market as “it stood out from all the rest” as it had a superior quality. A quality that is constantly sought-after, through in-depth sector studies and careful chemical analyses, carried out by a team of experts, committed to achieving the best possible result.
The Ghelco research, analysis and production path started in 2003, following extensive experience in the digital airbrushing field, a sector in which water-based inks have always been used. Expertise, analysis and research have therefore given life to extremely sophisticate pigments with an exclusive brilliance that, together with special resins, guarantee exceptional performance.
When pigments and resins are skilfully mixed with water, a product with truly unique characteristics is obtained, capable of being extremely effective both on glass and on wood, metals, fabrics, ceramics and plastic.
- Water-based pigmented inks
- Available colours: cyan, magenta, yellow, black, white and transparent
- Pre-Printing Treatments (primer) not required
- Post-Printing Treatments: not required on absorbent materials. Firing in a static or dynamic furnace at 160/180° for materials such as glass, ceramics and metals
- Excellent scrub resistance to detergents and solvents
- Excellent scratch resistance
- Coating: compatible with all base water paints and solvent base
- Glass Layering: Certified with both EVA and PVB.
- Easily removable with water on non-absorbent materials, in the event of a print error if the baking process in the open has not been completed.
- Perfect ecosensitivity: water base product with very low VOC content (volatile organic compounds)
WOOD AND SURROGATES
GLASS, METALS AND LEATHER
COLOURS ESPECIALLY DESIGNED FOR USE ON ALL MATERIALS
The special water-based formula of Valjet colours, the extremely fine grinding of the solid pigments used, the very high quality of the pigments enables Valjet decorations to be carried out with an excellent chromatic strength, an optimal level of penetration as well as physical interaction with the material, grip/adhesion and the total lack of materiality/thickness.
The quality of the pigments ensures an extremely high UV resistance, an essential condition for products targeting high and medium-high end markets.
The characteristics of transparency as well as the opaque options determined by the white ink process printing with the possibility to vary the intensity of opacity (1–100%) make it possible to carry out decorations or digital colouring that can interact with the aesthetic language of the material itself, enhancing its aesthetic peculiarities (reflections, brilliance, natural textures such as wood, stone etc.). Today it is possible to vary the transparency desired to enhance the value of the material by physically and fully integrating the colour with the material substrate.
The water-based formula determines full compliance with the aesthetic and technical nature of the material, entirely avoiding any type of chemical or physical alteration. This is an extremely appreciated aspect for natural or noble materials.
Moreover, the Valjet colour does not release any type of toxic volatile substance or odour (an advantage that must be highlighted also for wellness reasons and the additional costs relating to the treatment of the technical areas of production of Valjet users except for sewage treatment plants, ventilation systems, toxic waste disposal systems, etc.).
The adhesion of dust on the colour is a typical problem of painting operations.
The capacity of the colour to immediately reach the “dust-free time” state makes it possible to exclude idle storage time and above all, dedicated painting areas in which the dust has been removed from the environment by means of suction units and filters.
The characteristics of the Valjet system together with the quality of the colour make it possible to decorate smooth, rough or uneven surfaces with volumes, bas reliefs etc. with height differences of up to 3 mm.
This characteristic makes it possible to design digital decorations on mechanical processes carried out prior to the material decoration stage (milling, moulding, laser operations, etc. to create high and bas-reliefs, cuts, engravings etc.).
INKS exclusively produced for the Valjet 1000 and 1600 H20 digital printing system
Manufacturer: HORN PUJOL (Spain)
Testing body: Ghelco Srl (Italy)
Inks used: cyan, magenta, yellow, black, white
WSG-19-1 pigmented water-based Valjet inks
Lamp used: FLUORESCENT SUN LAMP
Operating temperature and humidity
Exposure time: 4,000 hours
Radiation type (UVA, UVB,IR, etc.)
Type of colour sample performed:
Digital printing Chart colour with a density ranging between 100% and 10%, carried out using Valjet 1600 H20 system
Print resolution: 720×720 DPI 2 overprint
Post-Treatment: firing of inks in a static furnace at 180° for 60 minutes (excluding temperature ramp increase/decrease rate)
The printing was carried out on a 4mm extra light float glass, laminated with EVA produced by Pujol with a thickness of 0.76 mm, and with 4 mm extra light float glass.
The exposed side of the inks was therefore protected by a 4mm float glass sheet and EVA.
Measurement of results were carried out using X-RITE I one pro spectrophotometre and Profile Maker software.
For sake of simplicity, the total value resulting after taking a reading with the densitometre at 100% - 50% 10% densities, before and after UV exposure.
|BEFORE UV EXPOSURE||DOPO ESPOSIZIONE UV|
|TOTAL DENSITY VALUE 100% CMYK COLOUR (overprint):||292||288|
|TOTAL DENSITY VALUE 50% CMYK COLOUR (overprint)||150||142|
|TOTAL DENSITY VALUE 100% COLOUR BY COLOUR (no overprint)||30||24|
|TOTAL DENSITY VALUE 50% COLOUR BY COLOUR (no overprint)||CYAN 292MAGENTA 276YELLOW 246BLACK 292WHITE 137||CYAN 292MAGENTA 274YELLOW 244BLACK 292WHITE 137|
|TOTAL DENSITY VALUE 50% COLOUR BY COLOUR (no overprint)||CYAN 148MAGENTA 146YELLOW 146BLACK 152WHITE 74||CYAN 147MAGENTA 144YELLOW 140BLACK 152WHITE 70|
|TOTAL DENSITY VALUE 10% COLOUR BY COLOUR (no overprint)||CYAN 30MAGENTA 30YELLOW 29BLACK 31WHITE 17||CYAN 30MAGENTA 29YELLOW 19BLACK 31WHITE 15|
As can be seen in the tables above, the toning/degradation of inks, after exposure to UV rays is practically zero in the high and medium density values. The value is barely significant in the low densities (approximately 10/15%), especially for yellow, which undergoes substantial degradation. Therefore, these are to be considered suitable for outdoor decorations, using the abovementioned lamination process.
It is just as likely that with an EVA film of a thickness double that normally used, the performance could even improve, given the high UV-absorption power of the film itself (over 98/99% UV absorber). For the moment, it is not advisable to carry out face-exposed decorations on outdoor glass with direct exposure to weather conditions, smog and UV rays.