Response to How to calculate Tetenal's Beta

Greetings,

The Gamma, or Contrast Index, should be the ratio of exposure to density, per given film development. I'm not familiar with Tetnal's Beta, but assume it's the same thing. If it is, then you would graph the density vs exposure (using Log units) and find the slope; the slope is the contrast index or gamma.

While Tetnal's WEB site may not be of help, JOBO-USA is the US destributor and they have very good technical support. If I remember correctly their WEB site is JOBO-USA.COM and you can find an e-mail address for their technical support (I think it's tech@jobo-usa.com, or something like that.)

Regards,

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