Mixing opaque and trans paints

[Jayhawk]

I'm just getting started trying to mix my own colors. Couple or so questions:
I've settled on using ComArt paint as it is working fine for me so these are based on those paints
Is it ok to mix opaque and trans paints? I only do it because I may have the color I want to add to a mix in one or the other, not any special effect. Is there any special effect? Or problems?

 

[Jayhawk]

Another question I forgot to add, in the ConArt line, which colors are the truest red, yellow, and blue to use as primaries for mixing?

 

[markjthomson]

Yes it's OK to mix trans and opaque, the trans is an opaque paint without a base added. In simple terms paint is a pigment (the colour), a carrier (to keep the pigment in suspension) and a thinner to make it flow. Often the pigment is a white or black base with other colour added to make it the colour you want. A transparent just has the pigment, no base. Remember you will still be dealing with an opaque paint.