Re: Photopolymer Plate Options

[Jon Lybrook <jon@terabear.com>]

Hi Keith,

I actually learned the splash/scrub technique from Dan Welden, but my 
time in the drink is shorter.  I think he now recommends 90 seconds.  35 
is what seemed to work best for me with my plates/screen/exposure 
times/curve/light source, etc. 
35 seconds might, of course, produce different results under your 
approach if you're using the standard aquatint screen -- even if we're 
using the same plates, etc.  I'm sure you know this, but it seems 
pertinent to mention it here.

It's like an inverse domino effect.  Once the preferred approach is 
established, each parameter is related to all the others by necessity to 
get consistent results.  If one is out of place or somehow different, 
then only some of the dominoes will fall:

___  ||||

:-o

And if you do decide to move one of the dominoes as an experiment, other 
ones must also be moved accordingly for it to work in a similarly 
consistent manner to your proven and preferred approach.


___////

:-)

Jon

taylordow wrote:
> Hi Chris,
>
> I've never used a washout higher than 70-72 degrees with either types 
> of plate, although I admit to extending the time very occasionally 
> from 2 to anywhere up to 8mins. No scientific reasoning going on here, 
> other than some plates and exposures you can just <feel> need a little 
> longer washout. Naturally, I'm curious to try Jon's times of 35sec. I 
> tend to let the plates sit still in the water for the first minute and 
> then gently scrub them in a linear movement, rotating the plate 90 
> degrees each time. Rinse with cold water and immediately blot with 
> sheets of newsprint to remove excess water.
>
> I'm using an aquatint screen that I got through Dan Weldon.
>
> Keith.
>
> On 2/16/07, Christina Z. Anderson <zphoto@montana.net> wrote:
>
> > > Jon, Nancy,  Keith, etc. etc.
> > ".............  I also notice that 100 degree washout for 5-10mn is
> > recommended whereas solarplate requires 68-78 for 2 mn. "