SECOND: Printing materials:lenticular sheet double sides adhesive
THIRD: Printer : UV offset printer or inkjet printer
there are 2 different ways of printing: UV offset printing is print the 3d photos on the lenticular sheet materials directly , , this way is suitable to 75LPI —161LPI
Inkjet printing is that print the photo on the paper first, then put double sides adhesive between photo paper and lenticular sheet, one side adhesive stick to photo paper, another side adhesive stick to lenticular sheet, then use a laminator to laminate them togeter this way is suitable to 15LPI — 70LPI