Poly wrapped Mailing Items Mailing items which are poly wrapped must be securely sealed on the front, back and side edges. The recommendations for any seal which runs along the length, or width, of the item are as follows: • this seal should be sealed at each end along the full length of the seal; • the free edge of the seal should be less than 30mm deep; • the preferred location for the seal is the back of the Large Letter; and • due to the recommendations for the seal when placed on the front, it cannot be across the width of the Mailing Item (but if on the reverse it can). If you have chosen not to have the seal on the reverse and have placed it on the front then please ensure you also meet the following requirements: • the seal must not be over the Delivery Address Block or over the Mailmark barcode; and • the seal must be towards the bottom of the Large Letter and be no more than 90mm from the bottom edge (see figure 21).
• it is flat and securely and evenly sealed to the inside of the envelope, with corners of the aperture that are curved rather than straight as this will help prevent damage occurring when the Mailing Items are going through the final machine sortation stage; • it does not take up more than 25% of the surface area on the side where it is found; • the window area where it is used for an address should fall within the Delivery Address Block area – please see figures, 22, 25, 28 and 30; • Gloss – (window and poly film): The gloss value should be ≤ 150 (American standards of testing and materials (ASTM) 2457 Measured at 60 degrees); and • Haze – (window and poly film): The haze value should be ≤ 75 % (ASTM D1003-00 Procedure A (Hazemeter). 13.8 Delivery Address Block and the Mailmark barcode When printing the Delivery Address the recommended maximum characters per line of the Address Block is 64 and please ensure that the content of one address line is not wrapped onto a second line i.e. Team Valley Trading Estate must be printed on the same line and not spread over two. We recommend that you use one of the fonts and sizes detailed in section 7 of this Appendix M and ensure that each line of the address has characters which are the same font and point size and that the spacing between the words is less then 5mm. Figures 22 – 31 are separated into paper and poly, trayed and untrayed and includes C5 (162mm x 229mm) format because of the smaller area, due to the Indicium and return address area, permitted for the Delivery Address Block. The Delivery Address Block and the Mailmark barcode cannot be located in the following areas (see also Figures 22 -31): On paper envelopes: • the Indicium area (40mm from the top of the envelope x 75mm from the right); • the return address area (40mm down from the top and no less than 75mm from the right); • the ‘Tag Code Zone’ (referenced on the longest edge of the Large Letter, 33mm up from the bottom right corner and covering an area 30mm high and 110mm long); • the ‘Route Code Zone’ (referenced that starts from the bottom edge up to 18mm high, stretching to 130mm in from the right hand edge of your mail piece); • a ‘frame’ around the Mailing Item (15mm around the perimeter i.e. the bottom, left and right edges); and over the edge of the envelope flap.
Figure 21 Sealing poly
13.7 Windows (paper envelopes) Although you are only permitted one window on your Mailing Item, you do have the option of using this window for either the Delivery Address Block or for advertising information. You do need to ensure that the window is not an open space i.e. there must be a transparent film covering the aperture and that it is square or rectangular (circular windows are not permitted). As we do not wish to limit your options when it comes to designing or purchasing window envelopes, we do not have any specific requirements for the strength of the window but we do recommend that when we do receive the Mailing Items from you: the window film is not flimsy i.e. should be sufficient strength and quality that it is not visibly creased or crumpled;
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