The reason why calligraphers want to write in the health proclamation stems from the prejudice similar to writing. Obviously, a different kind of paper can better play, but stubbornly believe that only Xuan paper can reflect the charm of calligraphy.
If you are lucky enough to witness the authentic traditional classic ink, you will find that they are not written on rice paper.
There are too many rules in calligraphy. Contact for a long time, the original wrong things, it becomes a law.