Question

Waxed papers provide a barrier against _________

(a) Penetration of oxygen only

(b) Penetration of vapors only

(c) Penetration of liquids and vapors

(d) Penetration of liquids only

I have been asked this question in a national level competition.

My enquiry is from Types of Paper in portion Paper and Paper Based Packaging Materials of Food Packaging Technology

Answer 1

The correct answer is (c) Penetration of liquids and vapors

For explanation I would say: Waxed papers provide a barrier against penetration of liquids and vapors. Many base papers are suitable for waxing, including greaseproof and glassine papers. The major types are wet-waxed, dry-waxed and wax-laminated. Wax-sized papers, in which the wax is added at the beater during the papermaking process, have the least amount of wax and therefore give the least amount of protection.