DuPont™ Tyvek® envelopes are insertable on most common commercial equipment with best inserting performance provided by 18 lb. stock. The envelopes used must meet the following inserting equipment manufacturers’ design requirements, such as:
• Flap dimensions and taper
• Throat design
• Enclosure size
• Overall envelope dimensions
• Open side or "booklet" style
• Remoistenable gum
