Perhaps there is a hobby that both of you love to do. You can use this 'theme' in your wedding invitations as well. If you both love to fish, you could use fishing line and lures for your invitations, or a hobby of wood_working could provide you with a way to expand your hobby into creating some special invitations. Regardless, if there is a hobby that the two of you share that helps to define you as a couple, don't be afraid to use it to your advantage and choose the best part of your hobby to direct your unique wedding invitation choices.
Thermography. This type of wedding invitation is relatively inexpensive, popular and easy to find. This type of invitation can be used for a casual wedding. Thermography creates the illusion of raised text through a printing process that heats the ink and resin chemical in a combination that causes the printed text to appear raised while the paper beneath it looks smooth. Because of the heating process involved in creating this type of invitation, the proper combination of paper and ink must be used.