If blue dyes give false positives so often why are they sold?

Question

I just don't see the point of them being sold if they're so unreliable. Like if there is a line there and it's thick and colored that means there's hcg in your system. Idk. I don't see how a test can give a bunch of false positives in a row

Answer

The issue is, that they evap, so you have to read them before 10, anything after is invalid...  Not false. I honestly think people should stop buying them. There's no reason. Walmart cheapies and dollar trees are the same sensitivity and better tests. Blue dyes have too much dye in them, they're more prone to evap, have dye runs, or just not work.

Answer

False positives are extremely rare. Sometimes an ectopic will register though.

Answer

I would disagree on the Walmart cheapies because I got evaps on two tests in two days.

Honestly anything after the ten minute mark should be read as invalid. Throw it away and move on.

Answer

It's not an issue if you have a good clear line, the issue is when people test early they almost always look like there COULD be a faint line. It's kinda like a hologram. Pink dye it's just there. It doesn't give that hologram effect.

If blue dyes give false positives so often why are they sold?

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