Re: polymer plate drying time

[Keith Taylor <taylordow@sprintmail.com>]

Jon,

I remove the Mylar and dust with talc (screen and positive). I have a  
33x43" vacuum frame with glass, get 22in Hg and I leave it for at  
least 3 minutes before exposure. I tried Susan's foamcore window  
treatment and it just did not work for me. I have a ribbed bed to the  
frame which causes problems with platinum prints, so I have a sheet  
of black plastic 1/32" thick.

You use an anti-static spray regularly don't you? I clean the glass  
with a non-ammonia, non-alcohol based cleaner, but no anti-static  
spray. I also use Pictorico on a roll (never sheets) with an Epson  
4000. I do have a 2200 that I use infrequently with sheet Pictorico,  
but not for gravure - usually small platinums. I dry the OHP in the  
film drying cabinet for 20-30mins low heat prior to use.

I'm just throwing out things here that you may recognise as being  
different from your setup.

K.

On Mar 16, 2007, at 9:52 PM, Jon Lybrook wrote:

> Sounds like it's working for you the way it should be for everyone.
> Have you found problems with blotting face down?
>
> I'm in Colorado, and we're as dry as can be here.  I'm convinced my  
> problem is taking place during the exposure of the positive, not  
> during blotting in any case.
>
> I assume you're removing the mylar on the KM73 before exposure and  
> have a vacuum frame with glass.  What kind of pressure are you  
> getting and how much drawdown time are you doing prior to exposure?
>
> Sorry if you've already outlined your procedure in other postings.   
> I'd love for things to work as easily for me as they seem to be for  
> you!
>
> Thanks,
> Jon