Re: "Split-tone" with gum

P.S. I should have added that when the pthalo blue was added in a
very small amount to deepen the PR 101, there was no split-tone
effect; the highlights are the same hue as the rest of the print,
just lighter in value. It's only when more of the complement is
added that you get this odd split-tone effect.
Katharine

On Jul 11, 2006, at 2:09 PM, Katharine Thayer wrote:

> Okay, I rummaged around in the odds and ends drawer of the paper
> file and found a piece of sized Fabriano Artistico Extra White,
> then put a splash of PG 36 (pthalo green) into PR 101 and printed
> it. Same result as on the unsized paper: dark chocolate in the
> shadows, milk chocolate in the midtones, pale greyish green in the
> highlights, and clear whites. So as I suspected, sizing doesn't
> seem to be a factor in this split-tone effect.
>
> Then I took another sample of PR101 and put the tiniest drop of
> pthalo blue (PB 15:3) into it, just touching the end of the pthalo
> stirring stick to the red paint. to see if the reason I've been
> getting brown rather than dark red was that I was adding too much
> of the blue. Sure enough, it printed a deep earthy red, darker
> than the PR 101 by itself but definitely still red rather than
> brown. Funny, I cautioned earlier not to use very much of the
> pthalo because it's so intense, but even I didn't realize what a
> tiny amount is necessary to darken the red, and how little it takes
> to push it over into brown.
>
> But don't take my word for any of this, try it yourself and see
> what happens.
> Katharine
>
>
>
> On Jul 11, 2006, at 12:08 PM, Katharine Thayer wrote:
>
>
>> David,
>> Re: Sizing, the short answer is that the paper I printed these
>> test prints on was not sized. I don't see any logical reason why
>> sizing or lack thereof would be a factor in this effect, but I'll
>> try it on sized paper later to be sure.
>>
>> The longer answer about sizing for me is that I started out
>> sizing in the beginning, because all the books said you had to
>> size, but once when I needed some prints in a hurry and didn't
>> have any paper sized, I took a chance and printed tricolors on
>> unsized paper, and as a result I realized that sizing was an
>> unnecessary step for me. I didn't size again for a decade or
>> more, until I started running into paper that didn't print well
>> for me unsized. The paper I currently use, Arches bright white,
>> is one of those papers. The factory sizing is inadequate, leaving
>> tiny holes throughout the sizing where pigment is
>> differentially absorbed, giving a speckled look to the paper.
>> See an example on my page on pigment stain:
>>
>> http://www.pacifier.com/~kthayer/html/stain.html
>>
>> about halfway down the page there is an example of stain on
>> unsized Rives BFK and on unsized Arches bright white.
>>
>> So this paper has to be sized. But I've not been able to size any
>> paper for a while, due to the upheaval of moving, and I had used
>> up all my sized paper. For these test prints I just grabbed
>> something at random out of the odds and ends drawer and used that
>> unsized. The whites are clear, so I don't think the unsizedness of
>> the paper is an issue here. Holding one of the prints to the
>> light, I see that it is watermarked Fabriano Artistico, and by
>> the coarse open texture of the surface of the paper, I'd say it's
>> Fabriano Artistico Extra-White hot press.
>> Katharine
>>
>>
>> On Jul 11, 2006, at 9:53 AM, davidhatton@totalise.co.uk wrote:
>>
>>
>>
>>>
>>> Hi Katherine,
>>>
>>> Thanks for replying. What an interesting
>>> phonomun..phienum...thing that happened.
>>> I've justed sized more paper (I'm assuming yours is sized..? I
>>> know you have
>>> preffered not to size in the past. ) I'm going to try it as soon
>>> as I can.
>>> Thanks. We just had a major power outage over here. 13 citys on
>>> the west coast
>>> lost all power and my computer's power supply exploded..eeek!
>>>
>>> Regards,
>>> David H
>>>
>>>
>>>
>>> ---- - Madasafish - Voted Best Heavy Consumer Broadband Provider
>>> in the 2006 Internet Industry Awards http://www.madasafish.com/
>>>
>>>
>>>
>>
>>
>>
>
>
Received on 07/11/06-04:34:14 PM Z