QTR-Quadtone RIP

Sandy,

Thanks for your reply. I thought that was what you were doing. I asked Jon Cone about this technique and this is what he responded: "you will not get continuous tone - you will get eventually low frequency dithering in order to make light light light tones”. I am assuming that you have not found this to be the case. Where are you getting Epson K3 PK ink in bulk?

Thanks again,

Alan





On Mar 7, 2015, at 10:36 AM, sanking@clemson.edu [QuadtoneRIP] <QuadtoneRIP@yahoogroups.com> wrote:
> 
> 
> Alan,
> 
> I am using full strength Epson K3 Photo Black in six cartridges, as follows. K=PK, C=PK, M=PK, Y=PK, LC=PK, LM=PK. In the other two cartridges I have the  regular light black and light light black, or LK=LK, LLK=LLK. The LK and LLK are not contributing much UV blocking density to the negative but since I am getting plenty with the other six inks with a Limit of 12 I left the LK and LLK at the same number.
> 
> In the profile the K curve is set to  "0;0 100;100" so you get straight line output from the printer. And since all of the inks follow the K curve adjusting transmission Dmax for different processes is very easy, you just lower or increase equally the ink limit of all shades. 
> 
> When using the most opaque ink in six shades you are able to create more total UV blocking with less total ink deposited on Pictorico than when using overlapping shades of gray of different opacity. 
> 
> I am using this system primarily for printing digital negatives, though curiously it works nicely for making glossy prints on paper, but with a Linearize different from the one below that is for digital negatives for my carbon transfer process. 
> 
> As is, this profile prints on an Epson K3 printer with UV transmission Dmax of about log 2.15.
> 
> Sandy
> 
> #Carbon 8K-12
> GRAPH_CURVE=YES
> N_OF_INKS=8
> DEFAULT_INK_LIMIT=50
> LIMIT_K=12
> LIMIT_C=12
> LIMIT_M=12
> LIMIT_Y=12
> LIMIT_LC=12
> LIMIT_LM=12
> LIMIT_LK=12
> LIMIT_LLK=12
> 
> GRAY_HIGHLIGHT=4
> GRAY_SHADOW=4
> GRAY_GAMMA= 1
> 
> CURVE_K= "0;0 100;100"
> COPY_CURVE_C=K
> COPY_CURVE_M=K
> COPY_CURVE_Y=K
> COPY_CURVE_LC=K
> COPY_CURVE_LM=K
> COPY_CURVE_LK=K
> COPY_CURVE_LLK=K
> 
> LINEARIZE="18.23 19.41 20.55 22.06 23.84 25.54 27.66 30.37 32.73 35.33 38.25 42 46.59 51 56.07 62.24 70.26 77.91 86.35 91.78 94.36"
> 
> 
>