RE: DIY flash gels

[mark@xxxxxxxxxxxxxxxxxxxx]

Now I do have an Eye 1 to calibrate a monitor, but not the Pro I don't think.  Yes the acetate would be filled with dots and likely wouldn't test as well in a lab, but from a practical standpoint would it matter????  First you get the pass through the gel, then the light gets bounced around and diffused most of the time.  That likely would diffuse the small areas between dots that are not the exact color.  Would it be perfect???  Probably not, but would it work?

Each gel probably has a value of R G and B somewhere, or if not that a C M Y and K.  Once you know those values the rest can be dealt with

-------- Original Message --------
Subject: RE: DIY flash gels
From: Edwin Blenkinsopp <edwin.blenkinsopp@xxxxxxxxxxxxxxxx>
Date: Tue, July 14, 2009 11:01 am
To: List for Photo/Imaging Educators - Professionals - Students
<photoforum@xxxxxxxxxxxxxxxxxx>

Using an i1 pro you could measure the colour of the light and by printing a range of colours select the one that gives the correct light.
Printing is generally a cmyk process and gets intermediate colours by printing different coloured dots so your not going to get a pure spectrum as you would with a specific dye
Edwin

-----Original Message-----
From: owner-photoforum@xxxxxxxxxxxxxxxxxx [mailto:owner-photoforum@listserver.rit.edu] On Behalf Of mark@xxxxxxxxxxxxxxxxxxxx
Sent: Tuesday, July 14, 2009 4:43 PM
To: List for Photo/Imaging Educators - Professionals - Students
Subject: DIY flash gels

I saw a blip on the web about a method of making your own flash gels.
They had a file with all 27 colors of flash gels you could take to
someplace like Kinkos, print them out on acetate and wha la you have a
flash gel.

They would provide the file of the 27 colors if you signed up for their
free website (I didn't) and an entire set of gels would have been about
$15 or so.

Just curious if any one more knowledgeable could provide some insight on
whether or not this method would work and how to come up with the
correct colors (that is without going back signing up and downloading
the file) and some other way might work better.

This kind of thing always intrigues me. I guess it is the natural
tickerer in me.

Mark