You can purchase the Primaries Secondaries on Black kit right here:
https://weaving.link/primaries-secondaries-gamp-sample-kit

Things you will learn:

-the power of a black background,
-how black keeps other colours clear,
-how the balance of colour changes in twills because we see more of each colour due to the float length,
-how colour and weave patterns appear in twills when we alternate colours in the warp and weft,
-we have been developing our technique to control our beater throughout this whole workshop and now we will use this control to weave twill and plain weave at the same sett.