Questions? Feedback? powered by Olark live chat software Frequently Asked Questions – Letter Jacket

Frequently Asked Questions


What is a diagonal seam?

Diagonal seam envelopes are configured with the tail flap of the envelope being angled to have the seams running in a diagonal direction to the point of the seal flap. These are historically known as commercial envelopes or the standard envelope style.

What is a side seam?

Side seam envelopes have the side seams running up the outer edge of the envelope towards the seal flap.  This style is sometimes referred to as web or booklet style and by its nature allows more room for printing on the back side (tail flap) of the envelope.

What is booklet or open side envelope?

The opening is on the long side of the envelope.

What is a catalog or open end envelope?

The opening is on the short side of the envelope.

What is a regular gum seal?

Regular gum is a remoistenable adhesive that is applied to the seal flap of the envelope.  It can come in split gum (most diagonal seam envelopes) or full gum (most side seam envelopes.)  One must apply some form of moisture to the seal flap in order to activate this adhesive so that the seal flap will adhere and seal the envelope.

What is a latex seal?

Latex gum is an adhesive derived from rubber latex.  In the manufacturing of envelopes, a strip of latex adhesive is applied to both the seal flap and the tail flap.  In order to seal the envelope, you simply close the flap and allow the two strips of latex to contact each other.  The latex strips will only adhere to one another and do not require any moisture to work.  One special attribute of latex envelopes is that you can open and close the flaps numerous times before the adhesive begins to wear off. This is unlike regular gum or PeelNSeal where the adhesive is designed for one use.  Latex envelopes are very typical in the banking industry (i.e. 3 ¼ x 7 drive in.)

What is a PeelNSeal (PNS) seal?

PeelNSeal is an adhesive where a single strip of glue is applied to the seal flap and then is covered with a slick protective paper.  All one needs to do is peel the strip of paper away from the adhesive and then close the flap.  This adhesive is a contact glue (not a remoist) and will therefore adhere with the flap as soon as it makes contact.  However, like remoistenable glue, this process is designed for a one-time seal.  The seal flap can’t be opened more than once like latex envelopes. 

What is a standard window?

A standard window must meet 4 measurement specifications. The size of the window must be 1 1/8" x 4 1/2" and positioned 7/8" left and 1/2" from the bottom. If any one of these measurements is different we consider the window special or custom.

What is a right hand window?

A right hand window is a window that is 1 1/8’ x 4 ½” and is positioned 4 1/8” left and ½” bottom. 

What is a fast forward window?

A fast forward window is a window that is 1 1/8” x 4 ½” and positioned 7/8” left and 5/8” bottom. This window is a little higher than the standard window to make more room for the barcode clear zone at the bottom of the envelope.

What printing process does LetterJacket use?

LetterJacket prints all orders using offset printing.   Offset is a commonly used printing technique in which the inked image is transferred (or "offset") from a plate to a rubber blanket, then to the printing surface. When used in combination with the lithographic process, which is based on the repulsion of oil and water, the offset technique employs a flat (planographic) image carrier on which the image to be printed obtains ink from ink rollers, while the non-printing area attracts a water-based film (called "fountain solution"), keeping the non-printing areas ink-free.

What is offsetting?

Offsetting is ink residue that can sometimes show up (typically as a light smudge) on the back of the envelope when heavy coverage or very dark colors are printed on the front.  This happens when the ink has not dried completely and the envelopes are put in a box and the ink on the face of the envelope contacts the back of the envelope in front of it. 

What is a security tint or inside tint?

A printed design on the inside of the envelope for added security.

What is four-color process?

Four-color process is a system where a color image is separated into 4 different color values (called a color separation) by the use of filters and screens. The result is a color separation of 4 images that when transferred to printing plates and sequentially printed on a printing press with the colored inks cyan (blue), magenta (red), yellow and black (the k in cmyk), reproduces the original color image. Most of the entire spectrum or gamut of colors are reproduced with just the four process ink colors. The four-color printing process is universally used in the graphic arts and commercial printing industry for the reproduction of color images and text.

What type of files do we accept?

We accept eps, ai, and pdf files.  If sending a pdf file please make sure fonts are outlined & images are embedded within the correct color space. If for some reason there is a problem with your artwork, a LetterJacket customer service team member will contact you to discuss the necessary steps to correct the problem.

What is a normal lead time?

At LetterJacket we strive to ship all orders out within 5 working days of receipt of approved art and/or proof.  This time frame does not include shipping transit time; therefore in most cases, one can expect to receive their order within 7-8 days.  If you need to receive your order quicker, you can either expedite the shipping during checkout or contact customer service to see if we can expedite the production of your order. 

What type of proof will I get?

Each order that requests a proof will receive it via email in a PDF format.  These proofs will have outlines of the size of the envelope, windows if applicable, as well as all printing.  The proofs will be to scale and therefore they can be printed to 100% size for viewing.

How are the envelopes boxed?

LetterJacket boxes most all orders in individual cartons of 500 envelopes.  For most orders larger than 2,500, boxes of 500 are put in a larger, more heavily corrugated carton to protect during shipping.  There are some specific sizes that are boxed 1,000 per carton but regardless of the specific quantity, all envelopes are boxed in a secure and protective way to ensure that they reach their destination in good condition.

Why can't my print wrap around to the back?

At LetterJacket we print all envelopes on offline printing equipment.  What this means is we are printing envelopes that have already been folded rather than printing flat sheets prior to converting.  These presses have the ability to lay down a lot of ink coverage on both sides of the envelope.  However, because we are printing on folded envelopes we can’t print copy the wraps around from one side of the envelope to the other.  

Do you make custom envelopes not available on your website?

LetterJacket has the ability to make nearly any envelope imaginable.  What we currently have available on our website are the envelopes that we stock and can easily print upon demand.  However, we have a wide range of equipment that allows us to make custom envelopes too.  If you are looking for something we don’t show on our website, give us a call.   We welcome any and all opportunities to serve our customers when it comes to envelopes.  That is the LetterJacket difference!

What is your return policy?

LetterJacket will accept returns of all plain orders if returned within 10 days of receiving the shipment.  Refunds, minus shipping charges and a 25% restocking fee, will be credited to the customer’s credit card used to place the order within 5 business days of receipt of returned product.  All returns must be received back in good condition in order to receive any applicable refund. 
LetterJacket will not accept returns on custom printed orders unless LetterJacket made an error when producing the order.
If a shipment is refused our carrier will return the product to LetterJacket.  The customer will be responsible for the cost of both the outbound and return shipping charges in these instances.
If you wish to return an order, have questions about our policies, or are not 100% pleased with the product received please contact customer service at or at 877-280-5083 to talk to a LetterJacket customer service team member.