How to Heat Orfitrans Stiff Thermoplastic Materials

Make the most of Orfitrans Stiff check socket materials

When it comes to moulding a check socket, good preparation is key. You should understand how your check socket material behaves and get to know the optimal working conditions. In this blog post, we explain the best way to heat Orfitrans Stiff.

The Orfitrans Stiff check socket material is a very rigid, transparent thermoplastic that does not break, crack or shatter, not even when dropped. This “Gold Standard” product will pull effortlessly and uniformly and has a very high fatigue resistance.

In order to make the most of Orfitrans Stiff, it is very useful to learn more about the material’s ideal heating technique.

Activation temperatures to heat Orfitrans Stiff


Heat Orfitrans Stiff to perfection

It is important to closely observe your Orfitrans Stiff Sheet while it is heating up in the oven. We recommend setting the oven temperature to 160°C (329°F), but you may want to play around with the temperature a little to ensure optimal mouldability.

While the sheet is in the oven, pay close attention to the forming of the bubble. When you notice that the bubble does not drop low enough, increase the oven temperature to 170°C (347°F). The higher temperature will ensure that the material drops sufficiently and that the right moulding conditions are reached.

Now you can start bubble-forming your Orfitrans Stiff sheet on the positive mould.


Got that Orfitrans heating technique all figured out? Then it’s the perfect time to focus on your bubble-forming skills! Refine them with our bubble-forming video.


Written by Marc Blij

Marc studied in Brussels and London and is a Certified Orthotist and Prosthetist.

After working in an O&P lab at the Universities of Louvain and Brussels, he decided to set up his own O&P lab in Antwerp. For over 30 years, he ran his own practice, together with his wife.

Since 2006, Marc works at the Orfit Industries headquarters in Wijnegem (Belgium) as a Product and Educational Specialist in Orthotics & Prosthetics and Physical Rehabilitation.


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