显影剂耗尽对柯达EKTASPEED Plus、Ektaspeed和超高速牙科胶片的影响。
Effects of developer exhaustion on Kodak EKTASPEED Plus, Ektaspeed, and Ultra-speed dental films.
作者信息
Thunthy K H, Weinberg R
机构信息
Louisiana State University of Dentistry, New Orleans, USA.
出版信息
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 1995 Jan;79(1):117-21. doi: 10.1016/s1079-2104(05)80086-1.
In 1994, Eastman Kodak Co. (Rochester, N.Y.) replaced its Ektaspeed film with the EKTASPEED Plus film. The manufacturer claims that one of the advantages of the new film is that it is not strongly affected by exhausted (depleted plus aged) processing solutions. The objective of the experiment was to test this claim. In exhausted solutions, EKTASPEED Plus film lost its speed more rapidly than Ultra-speed film but less rapidly than Ektaspeed film; that is, Ultra-speed film had the most stable speed. EKTASPEED Plus film lost contrast for 2 weeks before stabilizing, whereas Ultra-speed and Ektaspeed films continued to lose contrast for 3 weeks. Overall, EKTASPEED Plus film held its contrast over the other two films. EKTASPEED Plus film stopped increasing its film latitude after 2 weeks, whereas Ultra-speed and Ektaspeed films continued to increase film latitudes. In conclusion, for the three films studied, EKTASPEED Plus maintained the most constant levels of contrast and latitude in progressively exhausted solutions. All three films lost speed in exhausted solutions; EKTASPEED Plus film was the fastest but Ultra-speed film had the most stable speed.
1994年，伊士曼柯达公司（纽约州罗切斯特）用EKTASPEED Plus胶片取代了其Ektaspeed胶片。制造商声称，这种新胶片的优点之一是它不会受到耗尽（耗尽加老化）的冲洗液的强烈影响。该实验的目的是验证这一说法。在耗尽的冲洗液中，EKTASPEED Plus胶片比超高速胶片更快地失去感光度，但比Ektaspeed胶片失去感光度的速度要慢；也就是说，超高速胶片的感光度最稳定。EKTASPEED Plus胶片在对比度稳定之前的两周内一直在降低，而超高速胶片和Ektaspeed胶片在三周内持续降低对比度。总体而言，EKTASPEED Plus胶片的对比度高于其他两种胶片。EKTASPEED Plus胶片在两周后停止增加其胶片宽容度，而超高速胶片和Ektaspeed胶片则继续增加胶片宽容度。总之，对于所研究的三种胶片，EKTASPEED Plus在逐渐耗尽的冲洗液中保持了最稳定的对比度和宽容度水平。所有三种胶片在耗尽的冲洗液中都会失去感光度；EKTASPEED Plus胶片失去感光度的速度最快，但超高速胶片的感光度最稳定。
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