Storage Recommendations
Ambient UK storage conditions RH 45-55% at 21-25C
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River Series Humber is a range of board backed envelopes suitable for contents that need special protection whilst in transit.
Printed with “PLEASE DO NOT BEND” on the front, and made from heavyweight paper, these all board envelopes are perfect for mailing valuable documents as photographs, marketing communications, small brochures or catalogues - the Humber board backing offers additional rigidity and protects from folding or creasing.
River Series Humber board backed pocket envelopes are available in a selection of sizes, colours (White or Manilla) and with superseal (“Peal & Seal”) closures - the Manilla envelopes are 100% recycled and PEFC certified.
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