If the blue film you have is the photosensitive kind, then yes, it can be used. The process requires lamination of it to the pcb, exposure to near UV light, then development in a photodeveloper. It is most likely the product you have is a "negative" resist. That is, those areas that are exposed to light will be the ones that are not etched. In contrast, pre-sensitized boards are readily available that are "positive" resist. That means, you print your pattern as you want it and those areas not exposed to light are the ones that will be protected from etching. The developers for positive resists are usually just a dilute solution of an alkali in water.
Just follow the directions you have. If no directions are avaulable, I suggest buying some pre-sensitized, positive-resist boards and use them to avoid frustration. There are a lot of variables that can affect getting successful results with an unknown resist.
John