Digital BW, The Print

I know very little about coatings technology - but I have noticed that firm
brushing of Somerset Velvet Enhanced results in a very fine white dust
coming off the paper!!! This does not happen, to my eyes, with Hahnemhler
papers.

I wonder then, if SVE uses 'straight' chalk as a coating, and it is this
that encourages the dye to commute away from the surface and into the
paper... hence it's marked warming... whereas H* does something different
which is not so based around Calcium carbonate???

In other words, selection of paper coating will (as we already know from
experience) that coating will dramatically effect print longevity, but that
(perhaps) pigmented inks have a harder time as the dyes are so 'likely' to
handle a coating differently from the pigments.

It'd be great if someone like Robert could bring some data to this
suggestion!!! ;)

Nij


> -----Original Message-----
> From: Steadman Uhlich [mailto:steadmanuhlich@...]
> Sent: 15 October 2001 00:14
> To: DigitalBlackandWhiteThePrint@yahoogroups.com
> Subject: Re: [Digital BW] Re: A Call for Standards (Summary)
>
>
> Rightyo.
>
> I know that chromogenic prints (color photographs and I believe
> Dye Sub prints) are adversely affected.
>
> I do not know of any information saying color pigment prints
> (such as pigment inks) are adversely affected.  My gut tells me
> that color pigments and calcium carbonate go well together
> (thinking about Michelangelo's fresco work etc..).
>
> If anyone does know a source that indicates color pigments and
> and buffer agents (calcium carbonate) have negatives together,
> please post the citation.
>
> Thanks.
> Steadman