Hi guys,

I can't seem to figure out how to properly do a formula correction after the first mixing so any help is appreciated.

For example, I have Pantone 259 that has Rubine red 75 to 25 Process blue.

My formula for 20kg ink is:

8,25kg Rubine Red (41,25%)

2,75kg Cyan (13,75%)

5kg Technical varnish (25%)

2kg Base varnish (10%)

2kg Thinner (10%)

So we mix that 20kg, put it on press and it's slightly off shade so we add 3kg more of Rubine red and that's the correct color.

How do I then properly recalculate the main formula to include that 3kg later added?