Timing development

You should always base your process time on the latest information available for your usual developer. Then be prepared to use these figures as a guide or starting point. You should check each set of negatives carefully, if they are starting to look dark/dense then you will need to adjust the process time by say twenty per cent. If they are looking thin/light then a slight increase in process time is needed. It is a good idea to stick to one make of developer and film until you understand what it is capable of. By doing so, you will be able to extract every detail from the negative that was originally captured. With experience comes knowledge.