[argyllcms] Re: Using an i1 to measure FWA content?
- From: Ben Goren <ben@xxxxxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Tue, 2 Feb 2010 20:07:18 -0700
On 2010 Feb 2, at 7:49 PM, Graeme Gill wrote:
> Ben Goren wrote:
>> It just occurred to me: is there any way to use my i1 to measure the FWA
>> content of a
>> piece of paper? I know Argyll does lots of calculations to compensate for
>> FWA content,
>> but I don't see anything in spotread (or the like) that actually gives any
>> indication
>> of how much (if any) is likely to be present.
>
> Spotread gives you a number that is related to the level of FWA when you
> setup the compensation, but without some sort of scale it's going to
> be hard to interpret.
>
> Another way is to compare the normal and FWA compensated readings
> with a UV free illuminant. So:
Thanks. A couple quick tests show that that lines up with my ``gut instinct''
interpretation of the shoulder on the left side of the plot.
> Of course the best way is to use a spectrolino and compare the actual
> UV vs. non-UV plots.
I'm sure...but since the goal is to ideally find a paper without any FWA, I
have a strong hunch that this'll be ``good enough.''
Thanks!
b&
Other related posts:
