If you're like me, you've got a collection of books with pattern pages or expensive patterns with multiple sizes and you don't want to cut into them directly. Some pattern pages in books even have overlapping pattern pieces and so pattern transfer is necessary. There is an easy, inexpensive way to transfer them and keep the originals in perfect condition.
Pellon makes a product called Easy Pattern. It's light and easy to see through, but it's stronger than tissue paper and can be re-used multiple times.
To use, simply place the Easy Pattern over the original and trace. I like using a dark pen which doesn't bleed through to the original, but it's dark enough to read clearly on my copy.
Make sure to transfer important information onto your copy such as the grain line, darts, pattern piece name, size if applicable and seam allowance.
Cut out your pieces carefully and they're ready to use.
To store them, I like to put them in a small, easily re-sealable envelope. Larger pieces can be folded easily to fit in.
Finally label the outside of the envelope with the name of the pattern and size.