Impossible to say, it depends on the opacity of your mask and how fine
your traces are.
Usually one does a step test, where a strip of mask is withdrawn or
uncovered step by step in timed intervals, to determine the ideal
exposure.
<
https://www.youtube.com/watch?v=iIb8l2fccRE>
ST
On Thu, Jul 7, 2016 at 4:59 PM, Cristian
crissstian@...[Homebrew_PCBs] <
Homebrew_PCBs@yahoogroups.com> wrote:
> How much overexposure (%?) can cope the UV sensitive coated PCB, please?
> Cristian
>
>
>
> ------------------------------------
> Posted by: Cristian <crissstian@...>
> ------------------------------------
>
> Be sure to visit the group home and check for new Links, Files, and Photos:
> http://groups.yahoo.com/group/Homebrew_PCBs
> ------------------------------------
>
> Yahoo Groups Links
>
>
>