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Positive blue dye but negative pink dye???

I took a blue dye test last night (not FMU) and I got a faint positive - the thick line showed up within one minute - its not an evap because the line is as thick as the control line & is blue in color. I ran to Walmart and grabbed some pink dye first response tests - took one last night, negative and took one this morning with FMU and also negative.

I thought false positives were impossible???? Confused and heartbroken.

0 Answers • 6 years ago

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