U of S | Mailing List Archive | alt-photo-process-l | Re: Epson R2400 inks density - DISCLAIMER

Re: Epson R2400 inks density - DISCLAIMER


Other findings are:
- the absorption of the secondary colours (R, G, B) is not the sum of the 
absorption of the primary (Y, M, C) ones like one would assume. This happens 
with all the wavelengths and as to do with the printer colour management and 
perhaps with the particular inkset including light M and C.

I think this could be because when you print Green, it is not the same as printing Yellow and printing Cyan in terms of the amount of Yellow and Cyan that gets laid down.  Green has less Yellow and less Cyan than when you print the two separately.

- the absorption of a colour reduced by 50% (e.g. for Y: 255, 128, 255) is 
as low as about 15-20%. This is really puzzling to me, and I have no 

While the values in RGB are Linear, the actual densities are not.


On May 3, 2009, at 12:25:41 AM, "Alberto Novo" <alt.list@albertonovo.it> wrote: