kraft paper stand up pouch with window:

Material structure: Kraft paper(printing layer), PET (barrier layer), LLDPE or CPP (contact layer)

The window is made by pre-cutting a custom window on the Kraft paper and then laminating it with a transparent barrier layer(PET) and contact layer (LLDPE or CPP).

Stand up pouch with clear window:

Material structure: PET or BOPP (printing layer), PET or Nylon (barrier layer), LLDPE or CPP (contact layer)

The window is created by reserving a "no printing" area on the printing layer. The barrier layer and contact layer are transparent, allowing visibility of the product inside.

Transparent & metalized stand up pouch with window:

Material structure (front side - transparent): PET (printing layer), PET (barrier layer), LLDPE (contact layer)

Material structure (back side - metalized): PET (printing layer), Metalized-PET (barrier layer), LLDPE (contact layer)

The window is made on the front side, which is transparent. The rest of the pouch is metalized for a sleek look.

Aluminum washing stand up pouches with window:

Material structure: PET (printing layer), Metalized-PET (barrier layer), LLDPE (contact layer)

The window is made on the barrier layer by using a method called "washing aluminum." This process makes a portion of the Metalized-PET transparent. The printing layer and contact layer are then laminated, allowing visibility of the product.

These different styles of stand up pouches with windows provide varying levels of visibility and aesthetics, allowing consumers to see the product inside while still offering the necessary protection and barrier properties for the contents.