Keraflex Porcelain is made from ceramic raw materials and an organic binding matrix which
burns out when fired. Once fired, Keraflex is pure porcelain - 0.5mm or 1.0mm thick.
There is no other clay body that allows such a wide range of possibilities!
FUN FACTS ABOUT KERAFLEX
Sheets cannot dry out, as there is no water content. Simply store in the bag to keep clean prior to using your sheets.
After soaking in water for a few seconds, Keraflex becomes extremely flexible and can then be bent, shaped, twisted, folded, or woven and then left to dry before you fire it. You can even achieve a crease, if you desire a crisper fold!
With a feel much like a thick sheet of rubbery paper when wet, with care, Keraflex Porcelain can be gently folded to create thin and complex porcelain 3d forms. For maximum flexibility, soak the sheets for no longer than a minute or two in lukewarm water. The material will then have achieved maximum flexibility. Please note: soaking for extended periods of time may occasionally cause some gas bubbles to form on the surface of the sheets. This only occurs with the 1.0mm material and generally only after soaking for 8 minutes or longer.
No need to cover and control the drying process. The Keraflex does not have to be dried in a special way after soaking, unlike handmade sheets of porcelain, there is no fear of cracking while the product dries out. Simply let air dry then fire to cone ten. It couldn’t be simpler!
Keraflex Porcelain can also be used as a construction medium. No need to soak, straight out of the package Keraflex can easily be cut into complex shapes with scissors or a craft knife. Your Keraflex shapes can then be assembled to build 3d sculptures. You can choose whether to cut and construct before firing (some propping when firing may be necessary depending on the core strength of your form) If you wish to laminate sheets or pieces together pre-firing, a thin application of the Keraflex slurry provides a strong bond which also allows for the building up of several layers.
The Keraflex slurry is recommended as the best agent for laminating pieces together, as it is the same color temperature white as the Keraflex Porcelain sheets. It also creates a stronger bond than slip. Alternatively your shapes can be cut and fired flat and then constructed post-firing.
The Keraflex slurry is an ideal binding agent for the Keraflex Porcelain tape, as it is the same color white as the Keraflex, fires to the same temperature and will provide a strong and invisible join, should you wish to join, laminate or strengthen your artwork. It is best applied to a dry surface. If you are working with Keraflex while wet, allow to dry before applying the slurry where needed. Gently prise apart the two surfaces to be joined, then apply the slurry and clip (paperclips are ideal) press, or prop your work until dry. Then fire to cone ten.
Cone Ten: 1280°C/2335°F
Once this temperature has been attained, you can switch the kiln off and allow to cool.
If you are manually programming your kiln, then an ideal firing schedule would be a two stage schedule of 200-250°F/80-100°C per hour to 1100°F/600°C. After that temperature is attained during the second stage, you can fire straight up to cone ten:1280°C/2335°F as quickly as you wish, keeping in mind the rate that your kiln manufacturer recommends as appropriate for your particular kiln.
It is recommended that you use cones to help gauge the top temperature, as Keraflex does need to attain the full 2300-2335°F/1260-1280°C to be fully vitrified.
You can fire Keraflex as many times as necessary if for example, you are building up layers of visual imagery with stains or oxides or decals etc. Keraflex can be glazed after firing to cone ten, and then refired to the recommended glaze temperature.
To Bisque or Not to Bisque?
It is not desirable or necessary to fire Keraflex to bisque, because the sheets are just 0.5mm and 1.0mm thin, at bisque they are extremely fragile. If it is necessary for your work to be fired in a group bisque firing, ask your technician to leave your work in the kiln until the final firing to the full temperature, so that your work is not being handled unnecessarily at the fragile bisque stage.
Keraflex Porcelain is far more forgiving than other porcelains of the same thickness. Propping in the kiln for 3d pieces should be done as you would other thin porcelain work, however warping is far less significant with Keraflex.
We have found that flat pieces can even be loaded into the kiln overhanging the kiln shelves and will still shrink easily onto the shelf during firing with no warping or slumping, as long as you follow the recommended firing schedule.
As expected with porcelain, shrinkage is approximately 15% when fired to cone ten.
Note: If you have any questions about Keraflex Porcelain, simply click on the "contact us" button at the top of any page.