How to sharp blurry text on product labels

If you keep the aperture narrow in your camera setting when you are taking a photo of the product, you will be able to keep the entire object in focus. Along with this you can also use wide angle lens.

It is difficult to say without seeing your images.

First, see if the labels are actually well printed. Sometimes they have a print error where two colors making the text are not aligned.

From there see if:

• You have enough resolution
• It is not noise due to high ISO
• The aperture is not too wide, try using F8 - F11.
• You do not have motion blur, due to slow shutter speed, camera shake, lens stabilization.
• If your lens is simply not capable of making sharp images.

And last you can apply some sharpening in post.