Datacolor User to User Support Group.

--- In colorvision_group@yahoogroups.com, "peter_woelk"
<peter_woelk@...> wrote:
>
> 
> Hello together,
> because I use many papers which have printed their brand names (Epson,
> Canon) on the backside, I recommend (and I do so with success) to use
> a dark base to avoid mostly any reflection. Viewing against the light
> one can discover that one printed brand crosses a patch and annother
> patch is "brand clean". So I expect that a dark base brings in more
> even patch readings than a bright one.
> 
> Best,
> Peter
> 

Just a question here but .. if the brand shows through the paper
enough that the patch reader can detect a difference between a "clean"
patch and a branded patch .... does it mar your picture unless it also
is mounted on a dark substrate?

If you were trying to be as accurate as possible the reading should
technicaly be done on the mounting substrate.  Any difference less
than one delta E is by definition going to be extremely difficult to
see for the average person.