07 painted glass ceramic base painted glass

Ceramic silkscreen painted glass glazed into IGU’s –
photo courtesy of Taiwan Glass.
Painted glass is a popular choice of decoration
for residential and commercial applications.
Ceramic base painted glass remains the choice
product for spandrel panels in building facades
and for silk screen printed designs. How­ever,
there are now a number of new paint mediums
being applied to glass such as special
polyure­thane and silicone based paints.
ceramic base painted glass
Ceramic based painted glass is also known as ceramic fritted,
colourclad, ceramic backed or even opacified glass.
The paint is applied onto clear, tinted, patterned and reflective
glass (pyrolytic only). The glass is then heat strengthened or
toughened which fuses or bakes the paint to the glass creating
a per­manent durable coating. The painted product can also be
laminated for specialist applications such as overhead glazing.
The paint is applied to glass by silk screen print, digital printer
or roller/curtain coater.
features and applications
0Permanent, durable and non-porous;
0Spandrel panels for matching or contrasting vision panels;
0Door motifs (toughened glass only);
0Decorative panels for kitchens, bathrooms, internal wall
cladding, partitions, shower screens, signage and furniture;
0Automotive/marine and general transport glass,
incorporating dot matrix banding (for adequate seal­ant
bonding and protection);
0Reduce glare or filter light with special patterned designs;
0Wide range or colour options;
0Can be laminated;
0Paint is non reactive with the glass.
design and glazing notes
External applications – For external glazing, the painted
surface should always be glazed to the inside surface away
from the effects of weathering. Glazing techniques should
provide for an adequate seal;
Backlighting – Though this glass is used as a deco­rative
feature internally, backlighting should be avoided. One way
viewing through the non-paint side is always preferable;
Translucent cladding – There has been an increasing trend
in the use of more transpar­ent and less reflective glass.
A notable example of this is in the growth in demand of acid
etched or other translu­cent type glass. Spandrel openings
are usually non-ventilated and generate a lot of heat within
the confined space. Chemical vapours may also be released
from the silicones or adhesives used in glazing the panel.
These vapours deposit themselves onto the inside of the
glass surface upon cooling of the glass. These deposits may
become visible when using a transparent glass.
For these non-ventilated traditional span­drel applications,
it is recommended that an opaque (no see through) ceramic
fired paint colour be specified on heat strengthened glass.
(With ground floor glazing, where human impact is a
consideration under AS1288, then toughened or laminated
glass must be used as a minimum). Any vapour deposits will
not be seen from the outside. Ceramic-fired painted glass
has been used in these applications for over 30 years and is
a proven technology. The paint is highly resistant to this type
of chemical attack when enclosed. Where translucent type
glass products (such as acid etched, translucent laminated or
sand blasted glass) are specified, it should be asked where or
how these prod­ucts are to be used in the building. Ceramic
painted glass should be opaque or with no see through when
used in these non ventilated applications.
Photo top and second: Painted slumped glass and kitchen splashback –
photo courtesy of Glass FX.
In some instances, where the space is ventilated or a
double window façade is constructed, translucent ceramic
painted glass, translu­cent laminated or acid etched maybe
used provided that the coated or etched surfaces are not
exposed to weath­ering. The client should also be aware of
edge delamination if using exposed edged laminated glass.
Internal glass cladding (splashbacks) – Minimum thickness
is generally 6mm in either clear or low-iron glass. Low-iron
glass is recommended for true clarity and consistency of
colour. Colour mismatches may occur with ordinary clear
glass especially where the glass supplier uses glass from
different sources. Mismatches may occur if there is a rework
of a panel and glass is then cut from a different source.
Though there is less chance of mismatching with regards
to low-iron glass, we still recommend the policy of ‘one
source’ low-iron glass (i.e. Starphire® only). Toughened glass
is always recommended. Special note should be made here
with regards to protection of combustible surfaces near
cooking appliances. The use of painted glass panels for
kitchen splashback applications requires that this glass meets
the requirements under AS4551/AG101 and AS5601/AG601.
Suppliers of painted glass products should have accredited
testing results to verify compliance to these standards.
These standards are designed to prevent excessive heat and
possibly fire in combustible materials sup­porting the wall
covering. If testing evidence is not available fire resistant
materials must be installed behind glass panel.
Air face or tin side – Colour differences maybe noticeable
if painting the different faces of a glass panel. During the
manufacture of glass, molten tin is used to float the glass.
This creates a tin and air side. To avoid colour differences,
it is recommended that the paint medium be applied to the
air face or the non-tin side of the glass.
Toughened laminated ceramic silkscreen painted patterned
glass in overhead glazing application – Bradnams Commercial.
Sliding door showing ceramic painted motif.
lacobel® T
The Lacobel® T range is a pre-painted glass which can be
processed and toughened, which means faster lead times.
Lacobel® T uses a high quality industrial paint that is hard to
scratch, even before toughening or processing which results
in a lower risk of scratching during transport. In addition to
the obvious use in internal wall cladding such as splashbacks,
Lacobel® T is also designed for use in external facades.
Available in a range of thicknesses 4/6/8/10mm thicknesses,
dimensions 2250/2550 x 3210mm. Lacobel® T is available in
4 colour shades:
0Deep Black;
0Zen Grey;
0Crisp White;
0Cool White.
A painted coated glass, with a vinyl backing applied to the
painted surface to provide Grade A safety glass protection.
DecorPanel™ is purpose designed for wardrobe doors
and internal wall paneling, using a superhard grade paint
specifically for decorative glass applications.
Not recommended for applications where moisture is present
including, but not restricted to, kitchen splashbacks or
Available in 4mm thickness, colours of white and chino. Sizes
up to 2760 x 1220mm.
spandrel glass
matching/contrasting vision
and spandrel panels
Where the appearance requires the entire building façade to be
glass, with either matching or contrasting vision and spandrel
panels, the problem of ‘read through’ of the buildings hidden
structure/components through the spandrel panels must be
Matching – If matching vision and spandrel pan­els,
the general rule is that products with a visible light
transmittance greater that 20% are difficult to match.
Greater matching is achieved with high re­flecting products
with lower visible light transmit­tance (14% or below);
IGU’s – One method to assist in matching is to use IGU’s
or insulated glass units with the reflective coated surface
position #2 and an opaque ceramic painted frit on surface
position #3 or #4. IGU’s cre­ate the perception of depth
similar to that of the vision panel. Other benefits include
the reduction of condensation and improved longevity over
other methods as detailed below;
Opacifier film – A second method used is to directly
bond a plastic opacifier film to a single glazed panel on
surface position #2. This cost effective factory applied
film requires adequate ventilation to avoid damage to the
film when excessive heat build up occurs. Opacifier should
be cut back in structural silicone glazing situations for
maximum bonding strength between glass and silicone.
Please consult your film supplier with regards to film
warranty. Films are not recom­mended on glass with visible
light transmittance greater than 25% because of potential
see-through of air bubbles between film and glass.
The use of a shadow box is another cost effective method
of preventing read through. Dark coloured insulation or
fibrous cement sheeting is placed 25—50mm away from
the glass. Preventing condensation and designing an
adequate weep hole sys­tem are most important;
Spandrel glass refers to glass used to hide the build­ing
structure between glass floors. Ceramic base painted glass is a
common product used in these applica­tions. The spandrel glass
can be used to match or contrast with vision glass panels.
Contrasting panels – monolithic or single glazed ceramic
painted glass is commonly used here. All spandrel glass
panels should be heat strength­ened because of the high
risk of thermal breakage;
See photo opposite page.
Mock ups – With spandrel panels it is always
recommended that the customer view a mock up sample or
inspect a completed building before con­firmation is given
to glass design/specification.
In spandrel panels it is always recommended that glass be heat
strengthened because of the excessive heat build up generated
(upwards of 70˚C). In this situation the other benefit of heat
strengthening is apparent, where upon breakage the glass tends
to fragment into large pieces and stay intact in the opening or
The other main benefit of ceramic painted products for spandrel
applications is their greater durability in comparison with other
methods of spandrel glazing as described on the following page.
6mm Panasap Dark Blue vision glass with contrasting blue coloured ceramic painted spandrel glass panels – Bradnams Commercial.