We use secure Spiral Coil binding, which is far superior to comb or wire binding. Spiral Coil bound manuals will lay flat when folded back on themselves which saves space in your work area! 

• Comb bound books will not lay flat
• Wire binding is stiff, rigid, and will tear pages over time.

This manual is printed on smooth, 100 bright 28 lb acid free paper:

• It won't turn yellow with age
• Reduces or eliminates bleed-through from images and text on adjacent pages
• Less bleed-through = easier to read!

Others use low quality 20 lb & 24 lb copier paper, and tell you it's just as good. It's not, it's flimsy copier paper!