"Martin" > wrote in message
>
> Hi Edwin,
>
> Thanks for this. Have you heard of aluminium foil sealed covers for
> plastic trays for frozen food? I've seen it for frozen pet fish food -
> aluminium foil blister packaging. Any reasons not to do this for human
> food?

I don't know why it cannot be done. Some of the foil is also coated inside.
It has been a few years since I looked into that type of packaging so I
don't have any of the sources handy, but any of the packaging machinery
people can point you in the right direction. I don't know what you have in
mind for a budget, but none of this is cheap. The machines are all
stainless steel for sanitary reasons and the minimum quantities for the
overseal material can easily be a few thousand dollars.