ANALISA PENGARUH pH TERHADAP PERUBAHAN NILAI DENSITAS OPTIK (OPTICAL DENSITY) PADA FILM DENGAN VARIASI JENIS DEVELOPER

Abstract

The effect of pH on the change in optical density values on the film with the variation of the type of develope was analyzed. Expected results are able to provide good information in an effort to uphold the diagnosis .

To determine the relationship between the pH of the change in optical density values on the film using X-rays and objects illuminated Stepwedge, eksposi factor X-ray tube current 5 mAs with X-ray tube voltage of 50 kVp, generating a developer for one minute, the temperature of 24⁰C denagn A variation of the type of liquid developer A, liquid developer B, and the liquid developer C. The resulting film optical density value measured using a densitometer and compared the results of the relationship between pH and the optical density at three types of liquid developer.

Obtained results in liquid developer A is the highest value when the pH 11.01 with an optical density value of 2.93 at Step 11 and the lowest value when the pH 10.70 with an optical density value of 0.27 at Step 1. Liquid Developer B is the higher of the current pH 10.70 with an optical density value of 2.88 at Step 11 and the lowest value when the pH value of 10.46 with an optical density of 0.25 at Step 1. Liquid Developer C is highest when the pH value of 10.49 with 2 optical density values, 87 in Step 11 and the lowest value when the pH 10.14 with an optical density value of 0.21 in Step 1. So the higher the pH , the greater the optical density values and vice versa .

Keywords : pH,optical density, liquid developer, and X-ray.