Re: pigments for gum and PDN

Mark,

you have a problem with your link to PDN

David H

Ender100@aol.com wrote:

> Chris,
>
> In every inkset that I have tested with the PDN system, it has always
> been the Yellow ink that showed more density to UV light than Cyan or
> Magenta. Usually Magenta has the least.
>
>
> Mark Nelson
> Purchase the eBook & System for Your Own Custom Workflow@
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>
> In a message dated 6/11/05 8:11:05 AM, zphoto@bellsouth.net writes:
>
>
>> If it were pigment lightness/darkness that affected speed, I would think
>> yellow would expose more quickly, which it doesn't. I have not tested an
>> opaque red vs an opaque yellow (e.g. cadmium) to see if opacity has some
>> effect. But I can only test one variable at once. However, I have curved
>> two yellows, an arylide and a semi opaque, and those curves are quite
>> similar, which leads me perhaps erroneously to believe still that the
>> color
>> is a filter of its own nature, like filters you put on front of a camera
>> filter and change the tonal range on BW film.
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