Glassine paper is a smooth and glossy paper, which is air, water and grease resistant making it an excellent paper for various applications such as an inter leaving paper in book binding and can prevent damage from spilling, exposure or rubbing of illustrations, between dried printed art work, however it should be avoided with paintings with medium rich paints and also can be used for storing photos, stamps etc and also on Photo books and of course in packaging like confectioneries.
Pure parchment is functionally similar but produced in a different method hence is much more expensive than other grades of parchment paper. It is produced by running paper pulp.

This process partially dissolves or gelatinizes the paper. This process forms a sulfurized cross -linked paper with high density, stability, heat resistance and low surface energy thereby giving the paper good nonstick or release properties. Since the treated paper looks like a parchment (A writing material made from skins of animals) it is called parchment paper. Since this paper has low pH (Acidic) it is NOT recommended as archival paper.

Double side coated paper is used for many high uncoated wood free paper is coated with various chemicals or even polymer to impart certain qualities in paper for enhancing printing quality by improving weight, surface gloss, smoothness, reduced ink absorbency and gives it longer life.

Parchment paper (Butter paper) is defined by following properties:
This paper is very High resistance very difficult to damage even during boiling process.
It does not lose mechanical strength when subject to moisture environment.
These paper is suitable for medical purpose, Cleaned with Microbiological paper suitable for medical packaging and very efficient.
Parchment paper is highly fat resistant when making butter packing
It does not cause any “organoleptic “properties of food products, Benefits of this paper is that it does not alter senses which are taste, smell, sight and touch.
It complies with any hygienic demand which are similar to Aluminum foil or polymeric synthetic material such as LDPE.
This parchment paper is image print friendly paper hence can be printed and easily laminated with Aluminum foil as well. These qualities of Onpaper makes it the best paper company in the Australia - https://www.onpaperaustralia.com.au/