Signzworld 0.5mm Aluminium Panel giving me grief

[LD2122]

I'm having a bit of problem with sublimating these metal panels and wondering if anyone has had a similar problem.
If I use the orange silicone foam matt I get the weird clouding and it's as though there is either moisture or something wrong as if I use the matt that looks like underlay I can get a half decent sublimate.
It's like there is either moisture or the silicone matt is taking the heat away from the panel. I've left the foam on the radiator for a couple of days in case this is true but I've just done a test and it's the same.
Hope someone can shed some light on the problem. I've wasted all of the panels I had in stock so waiting for some more. I suppose I can use the underlay matt with silicone paper between but it's not ideal.

Settings:
Really light pressure
200c for 60 secs

Using a Signzworld 5 in 1 black heat press.

Edit: After reading another post, I'm wondering if the foam is too squidgy for the thin aluminium panel so it's not getting enough contact with the platten

[pisquee]

Are you pre pressing the metals?
The Mark's look like moisture problem .... they are where evaporating water (steam) is pushing out to escape.
Something you are putting in the press is damp, either the metal or your transfer

[ICF]

Use a polyester fabric rather than silicone between the heat press and the metal, the fabric will also absorb the moisture.
I've seen a similar pattern using silicone sheets with acrylic.

[LD2122]

Thanks for the replies. I got a perfect print today using the underlay type base mat, 2 sheets of silicone baking paper and I dried the print on radiator for an hour or 2 before pressing also went for a medium pressure. It definitely looks like moisture which I think is trapped in the orange foam. I'll leave it in the airing cupboard for a couple of days and try again.

[Mrteajunkie]

Why don’t you just use the press to dry it out?

I always (except in the summer months) heat the press and then let it run one or two cycles to dry out any moisture in the foam mats before pressing coasters.

[LD2122]

Why don’t you just use the press to dry it out?

I always (except in the summer months) heat the press and then let it run one or two cycles to dry out any moisture in the foam mats before pressing coasters.

It wasn't the matt in the end. I left it to dry on the radiator for 2 days and it was no different. The problem appears to be that because the sheet of aluminium is only 0.5mm if you use the silicone matt there is nothing to absorb the moisture as the matt isn't absorbent so the moisture gets trapped. If you press thicker materials like coasters then there is an airgap between the platen and the matt. If you press a thin material like the 0.5mm sheets there is no gap as the sheet gets pressed in to the matt which creates an air tight gap between the 2. Therefore there is no escape for the moisture and it gets trapped causing the above issue.
The reason the underlay type matt works is because it's absorbent whereas the silicone one isn't