It's easy enough if you use the none plain text editors.
What are you using to check the tyndal effect? I have never done a test in daylight, always in the dark using a red laser pointer.
The fact that you are having problems with two sources of CS and both are showing the same effect, where one should not, suggests that your light source is questionable.
I have a very basic setup and 20ppm CS produces a very slight tyndal effect and only more stronger, but still not what yours is showing, after I reduce it.
Can you purchase a cheap red laser pointer to test it? I do not think that sovereign silver should show a pronounced tydnal effect when the particle size is meant to be so small and the ppm is low.
Can you show a picture of the sovereign silver for comparison?