I have stopped using 3M because of this. I think there is a huge conspericy around V2 to V3 change over.
I know that I have had a roll labeled V3 when it first was anounced and it definately had bi-directional lines in the adhesion I KNOW IT DID.
the last 3 rolls I bought of V3 was still V2 material it was in a v3 box and roll labled V3 and is more money than the old V2.
3M thinks we's is stupid I quess and they say they are microspopic cross hair lines BS!!
I hate the Uni Line material as you can't push the vinyl against the lines or you get damage in it and little bubbles.
I personally liked the old glue they had too before they changed to this light grey glue even. Remember how 180C and others had a almost painted on looking light brown/tan glue?? that was the best stuff.
3M call me when you pull you head out of your A$$ and fix this problem and I might come back to your products!! I know I am not a big player in the game but what you are doing is wrong for everyone.
JUST MY OPINION!