Re: Modified Zia Formula ( Rising Bristol, again)


Roger Hein (rogein@interlog.com)
Sun, 16 May 1999 09:36:28 -0400


>+ a slight increase in contrast
>+ a slight increase in speed (maybe 10 - 12 %)
>+ a tendency for deeper darks (or as some may say: better D-max.
>+ a slightly more neutral color
>+ a more solid and uniform dark (This is determined by looking at fully
>exposed areas (brush marks) while the print is backlit with a bright
>light or the sun.)
>+ a bit more substance to the tones

Hi All,

I've just finished making some prints using Jeffrey's proposed modified Zia
and have had similiar results/benefits.

What I've found:

- the increase in speed and contrast are 'very' slight while the deeper
blacks, more neutral colour and tonal substance seem to be a little more
pronounced.
- 'double coating' with the 'standard' formula produced pretty much the
same result for me as the 'modified' single coat version - at least as far
as I can visually tell.
- using a previous suggestion by Carl I also tried sub-ing 20% of the
standard LiPd with regular platinum #3. Here the effects were very obvious
- deeper solid uniform blacks and a solid substance to the tones. The big
plus, for me, is the change in colour when printing on Rising Bristol.
It's definitely much more neutral than the 'straight' Zia - the midtones
being warmer than the darkest & lightest values. Overall a much different
'look' than a print made on Crane's and using the tungstate additive.

Hmmmm...so when does one no longer call a Ziatype a Ziatype? (or is the
sub-ing of lithium for sodium what 'defines' Zia?) Very confusing (sigh).

Cheers,
Roger...
Come Visit My Web Site!
http://www.interlog.com/~rogein



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