Self-adhesive envelope with silicon band: the glue on the flap is protected by a siliconed paper band, just throw it away and close the envelope.
Gummed envelope: the flap has to be moisten to stick.
Flap: we offer several forms of flap:



C6
Pointed flapDL
Straight flap15 x 15 cm - 5.9 x 5.9 in
Trapezium flap
Polypropylene: don't be affraid by this barbarous name, this plastic is one of the more ecologic (althought it still comes from petroleum...): it is recyclable and it doesn't contain any chlorin, unlike PVC).
PVC (polyvinylic chloride): this plastic is difficult to recycle, very difficult to destroy (the highly toxic smokes of burning PVC contains dioxine and chlorine). We're proud to have succeeded a total elimination of the PVC in all our products.