More than a million domestic cooker grill pans have been produced on this one Whale brand TUFNOL mould. Cams of the same material are used to control the operation of rolling the edges of the pans to provide a neat finish.
TUFNOL is easily and speedily machined with quite simple tools. The moulds are easy to handle, give a long service life and will not deteriorate in storage.
The photograph shows one of the TUFNOL moulds being machined.