Left is marquis, right is froehde

This pic is after about 30 sec. The marquis on the left went yellow then orange then brown then purple in about 30 seconds and the froehde went clear to yellow.

What do y'all think? Already tested with fentanyl, xylazine and nitazene test strips and came back negative for all 3.

Hi all! I preformed both the Erhlich and the Hoffman and got the expected results on assumed LSD blotter tabs. In addition I preformed Bunk Police’s Qtest, which turned a nice lilac blue, indicating 150ug of LSD.

Lastly I preformed the Marquis. The first time I tried Marquis it immediately turned a bright red color. This blotter was printed with a brownish gold picture. Above the tab looks a dark muddy red, but it was vibrant in person.

I repeated Marquis 2 more times on only the white borders of the blotter tabs which had no immediate response and slowly turned a dull brownish grey (3rd test not pictured!)

Can Marquis react to the ink on the paper? What are y’all’s thoughts??