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. Offset Printing. This type of wedding invitation uses normal, everyday print. Although the print may seem common, this type of invitation will still announce your wedding in an elegant manner.