Is the sample production stage necessary? Can I skip it?
We strongly don't suggest our client to skip this important step. Lenticular printing goes through a complicated process and your original artwork has actually been changed artificially before you could see the effect.
Moreover, good lenticular print requires particularly attention to details, skillful workers for pitch test, careful image positioning onto the lenticular sheet, and the result sometimes depends a lot on quite a number of factors, including at least the design, the color, the lens, the methodology and the experience of the manufacturer.
It would therefore be better to see the samples before mass production. In fact, the samples could also be used as a yardstick to evaluate the quality of finished goods and as means to protect your right when you have quarrel with your vendors about the goods quality.