Because I was really curious about what would happen if I measured 1/16th teaspoon of dye powder, I decided to do one more experiment using the same method and formulas discussed above.
I then dyed the fabrics. Below are the results. On the left is the original piece using dye that was measured. In the middle is the piece where I tried to measure 1/16th teaspoon. On the right is the piece where the dye was weighed. (The colors of the dyed fabrics below are a little different from the colors in the pictures shown above but this is because I took the photos in different lights.)
For the blue fabric, the colors of the middle and right hand pieces are quite close. This makes sense since the amount of measured dye in the middle weighed 0.3 grams, exactly the same as the piece with the weighed dye on the right. In the case of the red fabric, the middle piece is lighter than either of the other two. This is to be expected since the 1/16th teaspoonful of dye used for the fabric in the middle weighed 0.2 grams, less than the amount of dye used in either of the other two samples of red fabric. For the yellow fabric, the color of the piece in the middle is closer to the piece on the right. These two pieces differ only by 0.1 gram in the weight of the dye used so it makes sense that they look similar.
Hopefully the experiments in my three posts will help you decide whether you want to measure or weigh your dye. In most cases, my vote is for the latter, since weighing dye is easier, quicker, more accurate and less messy than measuring it. Weighing also allows you to use exactly the amount of dye you need, thereby saving money and reducing the use of water needed to wash out excess dye.
That said, some people prefer just to experiment with dyes, mixing by eye, or playing around to see what they get. That's fine too. As I said in my initial post, there is no one right way to dye fabric. But the more tools you have, the more you will be able to decide on the method that makes the most sense for your desired outcome.
Even easier than working with weighed dye powers is working with 5% dye concentrates where 5 grams of dye powder are dissolved in 100 milliliters of water. (If you need larger quantities of dye concentrate, you can use this formula to make up the amount of 5% concentrate that you need.) Making up and working with dye concentrates will be the subject of one of my posts later in the year, but if you want to know how to do this sooner, you can read all about it in my book.