Spectrum Booklets

Spectrum / Color Guide

Spectrum booklets or “color guides” are the key to most of our test kits.

How do the kits / booklets work? The basics:

  1. Place a very small amount of your substance in a test tube.
  2. Add one or two drops of the test kit liquid.
  3. A color change will take place over the course of a minute.
  4. Match this color change or “reaction” to the color guide.

These booklets are included with each kit and go into much more detail including full instructions, tips, & tricks to make sure you get the most precise results possible.


We tested hundreds of (lab verified pure) substances using each one of our test kits and filmed the results. This reaction footage was then “chopped up” frame by frame and each test was displayed in sequence, showing exactly how the color changed over time. The reactions each start at the outside of the spectrum and move towards the middle over the course of 60 seconds.

Every reaction in your booklet is also available in video form on Vimeo or through our Bunkleaks Android App. You can watch these videos in real time on your phone, tablet, or TV as you’re conducting tests. Highly recommended. Quick tip: record your test kit reaction with your smartphone so you can replay it later, even in slow-mo.


The largest “cell” (furthest from the middle) is the color change at zero seconds (the exact moment the liquid hits the sample.) The second cell is at 1/2 second, the next at one second, two seconds, three seconds, and so on until the end of the reaction at 60 seconds.




Matching your reaction to the chart isn’t the end of what these booklets can do. It’s also important to read only the results that actually apply to your sample. For instance, if you’re testing MDMA you’re not ever going to find DMT in that sample – so why look for it? We’ve made it easy to figure out which reactions matter for the substance you’re testing and which ones don’t.

The image below is a substance symbol key. Each of these symbols represent a mainstream substance – in other words, the substances that most people use our kits to test (like MDMA and cocaine.)

In the next image, you’ll notice lines connecting these symbols (on the right) and substance names (on the left.) These lines indicate a connection between the mainstream substance (symbol) and the adulterant (chemical name on the left.) In other words, those are the substances you’re testing for. The rest of the substances, without lines to the MDMA symbol, don’t apply when testing MDMA. In the next section we’ll put all of this together to show you how it works in practice.


Let’s go through a specific scenario: You test MDMA with the Marquis spot kit and the reaction is supposed to be purplish black. It reacts as green indicating that it’s not MDMA. Here’s how you can figure out what it might be:

To start, flip through the booklet (which is sorted by color) to find any green reactions. There are eight – so we need to figure out which one it is. In the image below (on the right) you’ll see a green reaction for ethylone. On the right page, you’ll see that there’s a line from ethylone down to the symbol for MDMA. This indicates that you need to be concerned about ethylone when testing MDMA. There are two other lines on the chart that connect with the symbol for MDMA. 2C-B and DXM.

Any other reactions on the chart are not of interest for this test as they don’t have a line connecting them with the MDMA symbol. This means they’re not likely to be present in MDMA.

DXM doesn’t have a green reaction. That leaves us with just 2C-B and ethylone. Let’s say the reaction started out light green, and then at 15 seconds the color turned medium green. This looks more similar to the reaction for 2C-B than for ethylone – so 2C-B is our most likely answer.

*Please note that FENTANYL will not react on spot kits unless it is VERY highly concentrated. You should always test for fentanyl using our FentKit strips and not with spot kits.*



“Non-reactions” are when a substance does not react at all – either staying clear or staying the original color of the test kit liquid.

If you’re testing, for example, suspected cocaine with the Marquis kit then you should not see a reaction. This is useful as many substances that can be mixed with cocaine will react with Marquis, like methamphetamine and various cathinones. If you see a reaction of any kind then this means that one of these other substances is present in your sample. This example applies to several other spot kits / substances and is a very effective tool for identifying dangerous mixtures.