Long-term Preservation
In contrast to most historical and present-day processes, cyanotype prints do not react well to basic environments. As a result it is not advised to store or present the print in chemically buffered museum board, as this will cause the image to fade. Another unusual characteristic of the cyanotype is its regenerative behaviour: prints that have faded due to prolonged exposure to light can often be significantly restored to their original tone by simply temporarily storing them in a dark environment.
Cyanotypes on cloth are permanent but must be washed by hand with non-phosphate soap so as to not turn the cyan to yellow.
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