Difficulty with solid white background product shots

[travisw13269697]

Has anyone been successfull getting pure white backgrounds while still having a small shadow for products?

We've tried multiple differnt custom light setups and  filling these 3 goals has been almost impossible:

• to get the product colors vibrant
• small tight shadow
• not have bleeds of grey (errant shadows) to the edges (especially need all edges of image to be pure white)
  
  Here's a rough example of what I'm after:  https://www.gettyimages.com/detail/photo/close-up-of-bottle-against-white-background-royalty-free-im...

[Ussnorway]

• something like this?

[travisw13269697]

Yes, that looks like you are getting 100% white edges. 

We had accomplished 100% white on some tests, but then the colors on the label would be blown out or lose vibrancy.

It always felt like the 3 goals I listed above were fighting each other.

Is there a custom light setup you're using there or a default? Curious if a color label would produce vibrnatly in your example.

Thanks for the response!

[Ussnorway · Accepted solution]

the basic trick is to use a blank white background image i.e, only white, and then build your lighting map to that background before added the sun light you need to make your shadow

p.s, I think your teacher wants you to understand the difference between shadow and reflexion... shadow has no colour but reflexion does so yes any [non white] studio light will defuse your model colours to some small amount