A proper martial arts technique scroll wasn't just plain old paper. It had to be a specific sort of parchment, approved or blessed by Shinto or Buddhist monks for use, and certified as spiritually neutral and thus free to accept the 'intent' of the writer. It then had to be recorded in a solemn and quiet place of meditation, like a garden, but a city park was good too, so that the calligraphy fully reflected the desires and feelings of the martial artist inscribing his thoughts and sacred techniques for posterity. It was essential that the paper be able to accept this, and of course, that it have the right feel itself in terms of texture, material composition, and durability. Specifically, it had to be easy to destroy, but not too easy.