Exclusive to the trade means we do not print. Send us your pre-printed flat stock or blank stock and we convert it in 14 days or less.
Cutting methods
A 3″ steel die cuts a lift of 150 to 200 sheets at once. Fast and economical. Cutting register can vary 1/16″ in any direction, which is within industry standards, so bleeds wrap 1/8″ over the fold lines and borders stay 1/4″ back.
A thin steel rule die cuts and scores one sheet at a time. This is the method for critically registered bleeds and borders, where image shift cannot be tolerated. Requires a larger one-up sheet because more gripper area is needed.
Two-way mailers, catalog order form inserts, comment mailers and perforated reply cards. We fold 3, 4 or 5 panels into a glued pocket with 1 or 2 perfs and a re-moisten gum strip, roll folded or double parallel.
Also available
Past the cutting and folding, this is the finishing work printers send us most. All of it happens in the same building, on the same job.
Windows can be placed almost anywhere on the envelope. Placement needs to be at least 1/4″ from the sides and 1/2″ from the top or bottom. We now have window patching for open-end catalog and large open-side booklet sizes too.
A pressure-sensitive adhesive strip runs along the seal flap under a removable liner. Peel the liner, press the flap down, and it is sealed. No moisture and no moistener needed, and the bond is immediate. Keep ink and varnish out of the seal areas so the adhesive has clean paper to bond to.
A strong adhesive applied in two strips. When the two strips are pressed together they stick to each other forming the seal. It can be applied over regular re-moisten seal gum on a ready-made envelope. Envelopes with latex gum are delivered with the flaps extended and are packaged in special size cartons.
We will measure and cut your stock to the proper sheet for the best die cutting result. Cutting charge is $100.00 per hour with a half hour minimum.
ECS is a custom manufacturer and does not stock ready-made envelopes. In 14 working days or less we can make your special order: blank envelopes, windows or regulars, from our stock of plain 24 lb. white wove or blue inside tint.
Adjustable high dies handle odd sizes and square envelopes. Specialty flap designs can be made with a steel rule die for letterpress cutting. If you do not see your size on the die list, call for layout sheet size and price.



We do not print, and we never compete with you for your customer. Send us pre-printed flat stock or blank stock and we return finished envelopes.
Standard envelope types
Open-side envelopes from 3″ x 4-1/4″ to 10″ x 15″. Catalog envelopes from 4-1/8″ x 5-3/4″ to 13-1/2″ x 16-1/2″.

A-style envelopes are constructed with a long, elegant square flap, hidden side seams and a shorter back. They are perfect for greeting cards, invitations and announcements.

Remittance envelopes have a wallet flap which provides a large printing area for order blanks or donation information. Used by charities, schools, churches and mail order companies, these envelopes are usually printed on both sides, which flat sheet printing and converting makes super easy.

Baronial envelopes, with their pointed flap, have a traditionally formal design well suited to invitations, promotions and formal correspondence.

Side seam envelopes have a straight flap with round or square corners, hidden side seams and a full back. Their more custom appearance is popular with designers. Printers appreciate the smaller one-up sheet size which has the best yield from a parent sheet.

Traditional commercial styling is used for many business and personal correspondence needs. Diagonal seams work best for automated inserting and postage metering. Nested multiple-up templates make flat sheet printing and converting very price effective.

With the seal flap on the short end, these envelopes offer sturdy construction for mailing brochures and catalogs, and are more economical.

Booklet envelopes have the flap on the long side and have a more formal appearance. They work well for machine inserting and are popular for sending large photos, statements and brochures.
See it run
From die cutting through gluing and folding. If you have not seen a job run before, this is the fastest way to understand what we need from your press sheet and why.
How your flat stock becomes a finished envelope, from die cutting through gluing and folding.
Send us a PDF and we will price it out. Most jobs run in 7 to 14 days.