I rarely NEED pre-treated cotton since most of my dye work is wet. This was the perfect occasion for nice dry pre-treated cotton. I wanted the thickened dye to "stick" to the spot I put it and not wick like it might on wet cotton.
I used both grey and black (MX Cotton Black 602a). I made the grey with a scant plastic knife tip of MX 602a and about 2/3C of print paste. The black was also 2/3 cup of print paste with a level tablespoon (dark) of MX602a. Below you can see I hadn't blended the MX powder well with the print paste. Colors are splitting out. Hopefully it won't be distracting.
I LOVE this grey and will do more with it later. I only applied the dye to one side of the fabric, crumpling it and doing a small amount of smearing. I want CRISP lines.
I covered it with plastic and let it batch under heated rice bags.
I absolutely LOVE the outcome. It was just what I was going for.
Front above, back below
Front above and back below. Either side is a winner.