Why??
Why do some hpt get evap lines with color? I know it's evap bc it showed up outside of the timeframe (about 30 ish minutes from the time it was taken. Maybe a little longer.) It's the equate brand. Is it just bc it's blue dye? The pic isn't the best but in person, that thin line is undoubtedly blue.
![](https://asset-cf-cdn.glowing.com/forum/topic/047dde50572723f4291e24f4466f4023.jpg)
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