Mainly because with the black going down first all other colors have to fit and hide behind the black detail. For me its easier to see and align individual spot color elements than Registration marks.

For surface prints like side art, that is a different story.

Since you start with colors and end with the black screen, registration marks are essential to know your putting it all down in the right place. So when you get to the final color black, you’ll know where and if you F&#*! up.

I didn’t see any mention of the registration. Were there marks on this screen? Or do you get to a point where you have done it enough that you as the printer don’t need them and have a good and steady had to register them by sight?

First, if it’s just a small, 1 time amount I need I’ll simply estimate the percentages right into the new container. Since the percentages are only guidelines they will always need adjustments. The 2nd method is important if I plan to mix multiple batches of a particular color. I convert the % to a weight that will fill the container. Example say 1 quart = 500grams I break the 500 down and weigh the inks going into the container. This way I now have a formula including adjustments to remix at a later time.

I have other screens that have squares burned in the screen to screen the color tests, or I may simply tape off an unused portion of the screen to screen a small sample.

The white you see is the pre-mask on the reverse side to keep the surface clean and to avoid scratching during production.