Seeded Paper Envelopes - an Important Message to Send? by Using Seeds Paper Letterhead or Envelopes, Youre Also Sending a Bouquet of Flowers with Each One - Creating a Greeting Thats Guaranteed to be Remembered. 50Gsm Colour or 80Gsm White, with Full Colour Print on Front (Up to 50% Coverage) & Growing Instructions on the Back. This Envelope has a Resin Adhesive with Tape Liner for Closing. Available in Blue, Yellow, Orange, Red & Green. Minimum Quantities Apply.