Only considering VXL support material, the higher the temperature, the better, since this will lead to faster dissolution. But the reality is a little more complicated. You need to consider the maximum temperature your model material can handle without deformation. A good rule of thumb for amorphous thermoplastics is to go 30 °C below glass transition temperature of your model material. For semicrystalline thermoplastics it is more difficult, since elevated temperatures might also lead to crystallisation which might also deform your model. For these materials, please see the material suppliers info on heat deflection temperature.

Some examples for maximum dissolution temperatures:

MaterialTemperatureAdditional Information
ABS real75 °C
ABS warp free50 °CPlease check data sheet of supplier and look for glass transition temperature
ASA75 °C
PETG45 – 60 °CThere are low temp and high temp PETGs out there, please check Tg
TPU80 – 90°C
PC-ABS80 °CThere are low temp and high temp PCs out there, please check Tg
PA70 °C
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