Used for several weeks. I visually inspected it and found no noticeable stains, but please be aware of this before purchasing if you are seeking perfection. A Japanese textbook that teaches the basics of Illustrator and design techniques in 15 lessons. - Title: Illustrator Operation and Design Textbook - Number of Lessons: 15 lessons - Publisher: Creative Publishing - Language: Japanese - ISBN: 978-4-7741-9282-9 Thank you for viewing.