precise paint mixing question

[ChuckT]

I am wanting to attempt figure paiting using acrylics but my problem is the paint mixes called for require pretty precise amounts to get the exact shades I need. One of the mixes calls for as little as 2% of a certain colour! 

I usually use a pippete or dropper for mixing paints (for airbrish work) and it has served me well, but I dont think it will cut it in this circumstance. The only way I can figure to mix things this precisely is by using a small scale and calculating paint volume by weight. 

Is there an better way to do this, or would an accurate scale that you can zero to remove the wieght of the mixing vessel be the best/most accurate method here? 

Thanks in advance, Chuck.

[Bill_S]

I've made custom mixes with these:

 

http://www.ebay.com/itm/2-x-2-ml-GLASS-STERILISED-REUSABLE-SYRINGE-HYPODERMIC-INTERCHANGEABLE-LABORATORY-/360797091888?_trksid=p2054897.l4276

[Icarus529]

I run my mixes through a program. I take the cmyk of the color i want and this program gives me the ammounts of paints to be mixed.

My limitation is a drop (0,5 ml). If the program tells me for example:

 

To make 10ml of a particular color

6 ml of black

2 ml of blue

1.5 ml of white

1.5 ml of yellow

 

Im just makingup these colors but, the pippete gives the ml quantities, but when i get to the decimals, i use drops (google a drop to ml converter). If it breaks down to even smaller fractions, i increase the overal paint quantity to 20ml for example so that i get to that minimim base measurement of drops. Some times its a waste of paint because i wont even use 2% of the color i just made, but i store it anyways. Maybe one day it could be useful.

 

I sometimes use my "eyeometer" and round off the decimals cos then id just be a rivet counter. No judge will ever put a colorimeter on a model...

 

Hope this is understandable and it helps.

Cheers