I found the instruction manual for the Multiphor II. It uses an alumina plate as a heat exchanger.

Hi Virginie

Despite the much easier application with kerosene, which characteristics allowed a better dispersion through both the plate and the gelbond, I also used either liquid paraffin or even water. Water is much easier to disperse, however may be tricky especially for long time IEF and liquid paraffin may be more difficult to disperse, especially when the plate is already cool. Furthermore it takes more time to achieve a homogeneous thickness below the gelbond, which my lead to possible smiles.

Thanks for your answers...

Last week, we have tried to run an SDS-PAGE with purified water, successfully.

Goodbye CMR, glasses, masks, fume hood, and safety inspection !!!!

have a nice week.