Security Envelopes

What's inside stays inside. Security envelopes print on 60lb security-tinted stock — a patterned inner lining that makes contents unreadable through the paper.

• Printed security tint inside
• #10 business size, window or no window
• 60lb uncoated · branded outside
• Order from 100

For mail that shouldn't be readable from the outside

Payroll, invoices, statements, checks, medical notices, legal correspondence — hold a plain envelope to the light and the contents show through. The interior security pattern scrambles that, so account numbers and balances stay private from the mailbox to the desk.

Choose your format

• #10 no window (4.125″ × 9.5″) — you print or label the address on the envelope. Best when the recipient's address isn't on the document itself.
• #10 window (4.125″ × 9.5″) — the address on your folded statement or invoice shows through the window. No second addressing step, no mismatch errors, and the security tint still hides everything else.

About the ink coverage option

Pick the band your outside artwork falls into: 1–25% (logo and return address), 26–50% (color band or partial graphic), or 51–75% (heavy color coverage). Our free file review confirms it before printing.

Upload, price, and order in minutes

Pick format, coverage, and quantity; upload; see your price live. Production runs 4–5 business days.

Specs at a glance

• Sizes: #10 window · #10 no window (4.125″ × 9.5″)
• Stock: 60lb security-tinted uncoated
• Printing: full color outside, front (4/0)
• Coverage bands: 1–25% · 26–50% · 51–75%
• Turnaround: 4–5 business days · Quantities: 100 – 5,000

Security envelopes FAQ

How does the security tint work?
A dense pattern is printed on the inside of the envelope, so light passing through doesn't reveal the text of the document inside.

Can I still brand the outside?
Yes — full color printing on the front, same as our standard envelopes.

Standard version?
Custom Envelopes in seven sizes.

High-volume mailing?
Self-Seal Envelopes speed up stuffing days considerably.