Re: [MW:13097] Re: contrast of film radiographic

Dear Mehdi,

For Density, as some friends mentioned before, you can use a densitometer. but about the contrast you have to keep in mind that in fact the contrast is not a quantitative factor. It is defined as "contrast is a difference between the density of two adjacent part of a film", so you can measure the density of two part of the film and the difference is related to the contrast. but please consider that transition in film density is usual, so measuring the contrast as a quantitative factor is not practical.

 

Regards

On Tue, Nov 29, 2011 at 2:42 PM, Mohamed Motawea <eng.motawea@gmail.com> wrote:

Dear sir;
 There is differnec between the film contrast and film density.

Regards;
Mohamed

On Nov 29, 10:43 am, yogeshkumar Kumbhar <kumbharyoge...@gmail.com>
wrote:

> Dear Mehdi,
>
> Measure radiography film contrast ( Density ) by densitometer.
>
> Regard's
>
> Yogesh V Kumbhar
>
>
>

> On Tue, Nov 29, 2011 at 10:21 AM, Mehdi Emami <mehdi.em...@yahoo.com> wrote:
> > Dear experts
> > Can anyone tell me how to measure contrast of radiographic films?in fact,
> > I want Definition  & contrast calculation method
> > Thanks
>
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>
> - Show quoted text -

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M. Shokri Arfaei

International Welding Engineer (IWE)

ASNT NDT Level III

ERI Metallurgy Lab. Manager

Tel: +98-21-66282127

Fax: +98-21-66282779

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