FA Blackberry: 1% !! warning, strong flavor!
First, I owe an apology to FlavourArt and anyone who has read my previous comments on this flavor. I got a bottle of FA Blackberry a long time ago that was so disgusting, I criticized it far and wide as one of the worst flavors I'd ever encountered. That bottle was horrible - it reeked of melted plastic. It came in a glass vial, so the container was not at fault. I wonder if FA had a batch that was no good, about a year ago - because I saw other people voice the same opinion around that time.
I recently got brave enough to try another bottle from a different vendor. This came in a plastic dropper bottle, original FA packaging. After the trauma of that first bottle, I hesitated to use it.
FlavourArt states this one of their strongest flavors, and I agree. 1% standalone is plenty strong for me. I hesitate to try it any higher, though I notice some are using 2-3%. I think this flavoring would taste floral if used much over 1%.