Re: About digital curves

Hello Masayuki Nishimaru,

I use about the same way to do my curves before. but I give some platinum
workshop and some of my student don't have acces to a densitomter so I was
looking for a way to ceate curve without anything more than your computer
and your scanner.

For those who don't have a densitometer, I remember you that Vuescan give
density file , and can be used as a densitometer.

Amicalement
best regards

Nzé Christian
mailto:christian_nze@hotmail.com
http://www.c-nze.com

>From: Masayuki Nishimaru <nisimaru@kt.rim.or.jp>
>Reply-To: alt-photo-process-l@sask.usask.ca
>To: alt-photo-process-l@sask.usask.ca
>Subject: Re: About digital curves
>Date: Fri, 14 Nov 2003 05:28:28 +0900
>
>Hello nze and folks,
>
>If you have a reflection densitometer and use Mac OS X, try my software.
>http://platinotype.jp/download/dotcalc/eng/DotCalcMacX.sit
>
>This software make photoshop curve.
>You can make your own photoshop curve files for your printer in 3 times
>tests with this software.
>
>1. make 101 steps gray scale negative without applying any curve.
>2. print with this negative, minimum exposure time you can get deep black
>on clear film.
>3. read density of 100% black (d-max) and paper white with densitometer
>4. input 100% step density and paper white then dotcalc software show
>correct densities for each steps.
>5. find the steps indicate correct density
>6. input percent numbers where shows correct densities
>7. save .acv file
>8. open 101 steps gray scale with photoshop and apply the curve you saved,
>and make negative
>9. print with this negative
>10. run dotcalc, load the curve file that you applied for test negative
>11. return step5
>
>I can compile this software for windows or Mac OS 9, if anyone need.
>please try.
>
>Masayuki Nishimaru
>Kawasaki, Japan
>

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Received on Fri Nov 14 12:09:08 2003