question bank class xii chemistry - WordPress.com
Chapter 22 of this book gives a thorough review of coating color preparation ......
The main area in sheet grades starts from 90 g/m2 and ends up at 300 g/m2. ......
26-31) normally involving the use either of polymers or of precipitation ..... 4) and
a brightness between 80% and 96% (TAPPI Test Method T 452 or ISO 2470).