The best way for printing on postcards suitable, oddly enough, the old dot-matrix printers, and typewriters. From all other similar devices, they differ in that allow you to fill the paper manually. This allows you to print on paper of high density, non-standard format, kinks etc. that are just inherent in the cards. Try to acquire one of these devices on eBay.
Fill the card in the printer or the typewriter in expanded form so that the surface on which will be the seal, was addressed to the head or arms. In the case of the printer, you must combine the left edge of the cards with the left border of the print area, otherwise the head may hit the edge of the paper.
Using the machine, you can apply a congratulatory inscription on a postcard the first time. But remember that in you will not. Only one misprinted letter and have to buy a new card. Print slowly and carefully.
If you use the printer, this problem is removed, however, the correct location of the text. It is important that he came to that part of the card, which is not occupied. Make a test printout on a sheet of thin paper having the same size and dressed the same way. Then align it with the card and check if the text in the desired area. If necessary, correct the layout and make a new test print. Only after making sure that everything fits, proceed with printing directly on the card.
Also for printing on postcards suitable and some inkjet printers, but only those which are specifically designed for printing on thick paper. The combination of text, perform the method described above and then print only on a matte surface. With glossy ink can be easily erased with a finger.
Laser printers for printing on postcards do not use, even if the gloss is on the reverse side. You can ruin the heating shaft. If your printer card is not adapted absolutely, use the last option: make a printout on thin paper, cut it out and carefully glue to the card.
Tape the lettering tape. At first, everything will look perfect, but then the glue can gradually dissolve the dye, and the image will become blurred.