Yvonne Gallagher Dec 28, 2015:

Alison might have nailed it! Maybe able to peel back the plastic?

Gely (asker) Dec 28, 2015:

thank you ! With your help, now I know at least that it is no usual expression, so I will ask the client.

So far I know, it does not refer to a logo or similar of a Mexican person.

"Mexican head" here seems to be an undesirable charasteristic of the bag, e. gr. like "peeling".

This bag https://www.caffenero.co.uk/shop/components/trolley/content/... is to be sold to the public as is, it has "no Mexican head" and "peeling possible"

But there is another bag model (no picture) that is to be sold into a box (it is cheaper then and its quality is no so good), it with certainty has "Mexican head and peeling"

Alison MacG Dec 28, 2015:

? Could it refer to the shape of the hole punched out at the top of the bag?

Mexican Hat hang tabs are ideal for hanging products at point of sale and point of purchase locations in store.
http://www.postapes.ca/catalog/product_info.php?cPath=318_32...

Including Handle holes, finger holes, Mexican Hat for hanging.
http://www.mka.com.au/hp Sealing Jaws.htm

Sheila Wilson Dec 28, 2015:

Head rather than hat? In that case, I'd guess the same as Gallagy. But it would just be a guess.

philgoddard Dec 28, 2015:

Yes If you could tell us the manufacturer, it may be possible to confirm this.

Yvonne Gallagher Dec 28, 2015:

@ Asker,

You should ask your client for an explanation. It might just be an image of a smiling Mexican (wearing a sombrero) on the bag but it might not! No point in guessing.