Pamela, its not really confusing.
The instant film comes in packs of ten or so that you insert in the back. Every time you make an exposure you remove the print/film with the shot which then develops outside of the back. The rest of the pack remains in the back. You are free to remove the instant film back from the camera body at will like the other kind of back with the use of a darkslide.
My question was regarding the removal of the pack itself from the back before it has been all spent as I will be using two types of instant film (BW-color) and I have only one PolaPlus.
Its not a big thing as the serious work I will be doing will be with one type of film, either BW or color.
I do mainly BW photography but I am also interested in experimenting with color polaroids or using them as reference for handpainting the BW photographs.
So, if I load a BW pack into the PolaPlus then it will probably be used for tests. I never so far have needed test shots (or the instant view of digital for that matter) as I always know what I get when I press the shutter. But, since I have some new equipment I have not used before including strobes, I will probably be spending BW polaroids for learning purposes.
Later on I might still be using BW instants as a safety precaution in a difficult or importand project and thus is my concern.
I would like to be able to shoot maybe a color polaroid or two during a BW session for experimentation, reference or actual creative use, so I was just wondering how much freedom of movement I have without getting a second instant back.
Thank you all and I apologise for the confusion.