According to the spam I keep getting, it's a SUPR SERCRET CODE THAT TELLS YOU WHICH HAS THE CHEMICALS!
Not, it's not. that's dumb.
Imagine a factory. there's a line of foil/paper/whatever going down the line. it gets printed on (including the eye mark (color line) This long bit of foil/paper/whatever is going to be a wrapper. They're not going to print on every individual wrapper. They printthe wrappers in a big uncut line of paper. Think like stamps. or those stickers you can get that come out of a little roller.
The eye mark tells the machine where to cut the individual wrappers out.
That's it. Nothing secret about it.
But how to tell what's in the toothpaste? Try reading the bloody ingredients!
Honestly. This bit of spam disturbs me so much. Not because it's misinformation or a fake health warning (which I hate) but because the bit at the end says "know what;s in your toothpaste" and so many people are sharing it and saying "wow, so many chemicals" and not one of those people thought "why not read the ingredients list? the one that in many countries has to be there and be true by law?"
And that so many people are apparently so concerned.. but not enough to read the ingredients.
that's way too difficult.