The ready to make envelopes are supplied flat, all that needs to be done is to stick the flaps down and put a length of double sided tape to the top flap and you have a perfect envelope.
Contour Card (Hammered Finish) - 300gsm. (500 mic). Laid Card (Finely Ridged) - 300gsm (500 mic). Stonemarque 300gsm (500mic). Conqueror cards are Acid Free