DSF

Just copied this from the Sublimetals web site. Not sure if your panels are the Chromaluxe ones.

CHROMALUXE SINGLE SIDED ALUMINIUM (panels, clocks, business cards, fridge magnets and cuff bracelets)
Manufacturers (Unisub) instructions: (These are for larger panels, so our smaller pieces may not need such a long time)
8 x 10″ panels – 200C / 70 secs
In press – printable side of the material up, transfer on TOP, face down. They advise using a sheet or 2 of absorbent paper underneath and above the material to absorb any excess moisture from the transfer. Medium pressure – but for larger panels higher pressure may be needed. Upon removing from press, allow aluminium to cool for 20-30 secs before removing the transfer. This allows the coating to re-harden and minimises the chances of edge damage.
(They also add: Occasionally you may see small imperfections in the surface of the material in the form of small dimples or bumps – this a naturally occurring phenomenon of the coating process and they regret they can not offer replacement of material with this effect)

I press subli metals and always press at 180 for 50 sec no issues.

These are the "Standard Single Sided Aluminium" just over A4 size, wasnt worth the extra expense of Chromaluxe.

I will give it a try with some absorbent paper to see if it makes a difference, I'll get some blotting paper and keep it on a heater for a few days and use a well dried transfer print.... just to be sure.

@A11kns if you look across a print in good light can you see patterning and what sort of pressure are you using.

Med to firm.