EZ TEST as SPEED quality tester ??

[JohnSmith]

Well I want to ask you if is possible to test the Speed quality with this test, you know as dark brown as better
works that with Crystal too ??

 

[Soma]

It is generally safe to say the stronger the reaction ie how fast it changes colour and how deep the colour is. the stronger speed is.
EZ-Test/E1/Marquis reagent is really good at picking up slight traces of speed. For a better qualitive reagent test you might want to try E2 (mandellen reagent?). It is easier to see qualitively with that than with marquis.