Exposure of emulsion-coated samples is carried out in dessicated light tight boxes at 4°C. The emulsions must be shielded from stray light and radiation. Low temperature and humidity is important to prevent


Long: 12.26 years Very long: 5760 years Moderate: 87.2 days Short: 14.3 days Moderate: 60 days the fading of latent images (resulting in lowered efficiency). The time of exposure can vary from a few weeks to a year and depends upon the nature of the experiment and the radioisotope used. In our laboratories we usually check batches of samples after every few weeks of exposure.

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