Digital BW, The Print

Bob,

> ...  I found the 
> following mixture to give me the color sepia I like:
> 
>   20% (3:2 of MISPRO-M:MISPRO-Y)
>   80% (4:1 of R800-Glop:R800-PK)

... 
> However, after shaking the mixture for about 30 seconds and watching
> the bubbles breakdown before loading a cart, I noticed that the
> individual colors seemed to be more obvious on the sides of the 
> bottle than with UT2-Y after shaking.  
> (The bottles for the two inks are different plastics). 

That could account for some of it.

> It made me wonder if there may be any material
> incompatibilities in this mixture. 

I think they are compatible.  The UT2/7 sepia is not that different.  
I believe MIS usually ran the formulas by the chemist at their 
supplier.  However, any mix of more than one type of pigment is more 
likely going to show some signs of separation, but that is more of a 
long run problem.  
...
> Paul, is it correct to assume you've mixed these families
> before and not had any unusual problems?

It's no secret that I didn't like the performance of the sepia in 
terms of longevity.  Also, I think there was more clogging in that 
position with those inksets.  However, I don't know if that was 
because of the mix or that people were not using it.

Paul
www.PaulRoark.com