GLASS-STONE-GLASS

GLASS-STONE-GLASS

Thin slab of stone material laminated both sides with glasses by FFPROCESS®

Some marbles, granites or stones, once thin laminated, gain translucency, exciting colors and natural features. Rare and precious onyxes may be used even in case they have natural cracks. The decorative thin layer of the stone laminated to the glass provide one product, the GLASS-STONE-GLASS, combining the beauty of the stone and the excellent mechanical characteristics of glasses. The GLASS-STONE-GLASS has a remarkable resistance to the stresses.



Technical characteristics
The specific gravity of glass is the same as the stone (2700 kg/cu m), so, the glass has only the function of trasparent layer support to thin layer of stone. The weight, in kilograms, of a common glass-stone-glass panel is calculated with the following formula: surface area of the glass-stone-glass panel (example 1.00 sqm) multiplied by the thickness of the glass-stone-glass panel (example 0.016 m), multiplied by their specific weight 2700 kg/cu m (1.00 x 0.016 x 2700 = kg 43.2). So, the weight of a common glass-stone-glass panel of 16 mm thickness is 43,2 kg/sqm.
GLASS-STONE-GLASS is shatterproof safety panel.
GLASS-STONE-GLASS panel stratification, vacuum with heat cycle and in absence of resins, is the maximum quality guarantee in terms of:
• duration
• security purpose (in case of shocks)
• durability of the transparent laminated glass with light transmission rate (except stone) more than 85%

Our working process to guarantee, according to UNE-EN ISO 12543-4:1998 :
• humidity condensation resistance (except stone)
The test is the humidity condensation test, according to UNE-EN ISO 12543-4:1998 “Glass for building. Glass laminated and safety glass laminated. Part 4: Methods of durability test”. The test involve to place some samples vertically into a climate chamber and keep them during two weeks in a temperature of (50+-2)ºC and a relative humidity more than 95%. It is allowed the water condensation on the samples area. Then leave the samples get cold and dry in a normal atmosphere and check in order to verify any failure in the intercalator (bubbles, opacity, etc). Result: satisfactory (a light opacity appears, almost negligible in all the perimeter but over 15 mm from the edge).
• high temperature resistance (except stone)
The test is the high temperature test according to UNE-EN ISO 12543-4:1998 “Glass laminated and safety glass laminated. Part 4: Methods of durability test”. The test involve to introduce the glass into a heater and keep it during 2 hours in a temperature of (100+-3)ºC. Then leave the samples get cold and dry in a normal atmosphere and check in order to verify any failure in the intercalator (bubbles, opacity, etc). Result: satisfactory (no failures and defects in any of the samples tested).
• radiation UV resistance (except stone)
The test is the radiation test according to UNE-EN ISO 12543-4:1998 “Glass for building. Glass laminated and safety glass laminated. Part 4: Methods of durability test”. The test involved to subject the glasses with 2.000 hours of radiation. For that reason, the samples have been placed from 1.100 mm in distance of 16 Ultravitalux lamps which made an area of (1x1) m. The samples place is according to the rule UNE-EN ISO 12543-4:1998 and the temperature was kept to (45+-5)ºC. To evaluate the durability, the illuminated transmission spectrum have been measured between 380nm and 780 nm before the test and 2.000 hours of exposure. It have been made a minimum of three transmission measures of each sample and calculated the average of them. From this point of average of illuminated transmission spectrum have been calculated for every one of them according to the rule UNE-EN 410:1998. Also we inspected the samples in order to check for any failure (bubbles, opacity, etc). Result: satisfactory (after the 2.000 hours of exposure, we can not appreciate any failures in the intercalator).

Usable types of stone
It is possible to use any stone, once being checked in advance for the level of transparency, after gauging to thin thickness.
Usable types of glass
It is possible to use one or more glasses, in various thicknesses. Normal float or extra-clear glasses, stratified glasses, tempered glasses etc.
Dimension
GLASS-STONE-GLASS panels maximum sizes are mm 2800 x 1500.
Thicknesses
Stones materials: from 2mm to 6mm. Glass: from 4mm to 10mm, multi-strata or not (other thicknesses on request).
Cutting
The GLASS-STONE-GLASS panels can be cut by:
• Traditional machinery using normal tools of glass industry;
• Water jet cut machine.
The GLASS-STONE-GLASS panels adopting tempered glass are produced in fixed sizes only, because they cannot be cut after lamination.
Types of application
Interiors with high strength requirements: shelves, work plans, internal walls, enlightened walls, floating floors, enlightened false ceiling, desk tops, tables, door claddings, vanity tops, etc. The GLASS-STONE-GLASS panels may be used also outdoor, in properly framed metalwork.



GLASS-STONE-GLASS table
Size mm 2800x1500x45
Onyx mm 5 thickness (central layer)
Double stratified on both onix surfaces with extralight glasses mm 10+10 thickness (external layers)
Neon backlighting system




FACTORY PRODUCTION CONTROL to guarantee the mechanical characteristics of GLASS-STONE-GLASS panels:
• Flexural strength under concentrated load, before and after ageing cycles;
• Rupture energy, before and after ageing cycles;
• Monoaxial Traction, before and after ageing cycles;
• Other specific quality tests for any specific final application



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