Re: polymer plate drying time

[Keith Taylor <taylordow@sprintmail.com>]

Jon,

I'm not sure about the effects of drying AFTER the post-exposure, but  
my post-exposures of screen+image exposure mean they are all around  
the 30 sec mark and I haven't noticed any problems. Occasionally I'll  
double it to be safe (no scientific reasoning!) and certainly going  
to about 5 mins wouldn't hurt.

I think it's Boxcar that warns against using certain plate cleaners  
after printing, for fear that they'll dry the polymer out too much  
and that splits and cracks will appear over time. Could it be that  
prolonged post-exposure might have the same effect?

Keith.

On Mar 15, 2007, at 7:33 PM, Jon Lybrook wrote:

> Do you suppose drying the plate after post-exposure would have the  
> same effect?  I'm thinking about plates I've already got but  
> haven't printed yet..
> I can't see doing a post-exposure for the the time of my screen/ 
> image plus some like you do though Keith.  That would only be less  
> than 30 seconds for me!  I think once the plate becomes the nice  
> blue-green hue as opposed to the light green it's probably good to  
> go though, don't you?
> The new Toyobo plate sounds like something I should certainly try  
> as well...especially with the finer dot screen I use.