Re: polymer plate drying time

[Jon Lybrook <jon@terabear.com>]

So Keith,

Do you have any problems with the KM73s and OHP with those patches 
plaguing the rest of us?  How do you mitigate them?

Someone recently suggested I try spraying a little silicon spray onto a 
rag and buffing the plate.  Seems that Solarplates have a slightly 
viscous quality to them while the KM73s are more tacky.  I'm probably 
going to test both with a light buffing of silicon AND 4 passes with the 
Kyrlon 1303 this weekend and see which, if either, work.

Drying seemed to help the durability quite a bit.  No scratches after 7 
prints.  Thanks again for that feedback and advice!

Jon

Keith Taylor wrote:
> 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.