I have been making organic natural skincare lotion with a shelf life of 6 months using natural preservative. I tried to sell to retailers but they required my product to have at least 2 years expiry date/shelf life.
I found that other natural skincare brand have a 3 years expiration date if unopened (and 1 year shelf life after opened).
May i know if anyone know how to make to seal my product with a very long expiration date ? Do i just need to use hot-air sealing machine to seal my product? Or do i need to add some nitrogen in it? or any other methods?
Please kindly help
Thank you in advance