Digital BW, The Print

> -----Original Message-----
> From: bruce greene [mailto:bagreene@...] 
> Sent: Wednesday, December 17, 2003 7:52 PM
> To: DigitalBlackandWhiteThePrint@yahoogroups.com
> Subject: [Digital BW] QTR and poor man's densitometer?
> 
> 
> I'm one the happy users of Roy's fabulous Quadtone Rip software.
> 
> The curve generating routine has this neat automated linearization 
> routine that requires the use of a densitometer.
> 
> Unfortunately I don't have one and can't really afford one right now.
> 
> But I have an idea if anyone is game.
> When setting the ink limits I print out the 21 step wedges, cut the 
> strips for each ink, and compare the densities by placing on patch on 
> top of another to compare. And I asked myself, "wouldn't it 
> be cool if 
> I had a 100 patch printout with the measured densities 
> included. Then I 
> could print the 21 step wedge, compare to the measured 
> patches, and I'd 
> have the densities of my wedge to input into the 
> linearization routine.
> 
> What do you all think? Is anyone game for printing and measuring the 
> 100 step wedge. I know I'd be willing to pay for it, and if it works 
> well so would others I might think.
> 
> 
Bruce,

Another idea for you. Go to:

http://www.stouffer.net/Productlist.htm

Contact Stouffer and purchase their 37-step calibrated reflection guide,
R3705-1/2C fro $29.60. This will come with density readings for each step.
If you have any kind of a flatbed scanner you can then scan this calibrated
target along with the 100-step wedge you print with your printer. From the
scan in Photoshop you can use the eyedropper tool to measure K values.

With a bit of math you can use the scanned values and the calibrated values
to calculate the density values of the step wedge you printed.

Martin Wesley
www.carolynfrayn.com/Guests/MartinWesley/pages/MW_01.html
www.borderless-photos.de/guests.html