Citation :
« Everyone involved knew that shooting [Royal Journey in colour would greatly enhance its value and guarantee greater exposure in Canada and throughout the world. The problem was, apart from the costly Technicolor process, there were only a few inferior colour systems available. Technicolor was ruled out as it required the use of very bulky cameras as well as specially trained film crews. The NFB would not be able to use its own cameramen. The biggest problem however, was that Technicolor required bright sunshine or very powerful lighting to have any chance of looking good. The weather in Canada in the fall is very unpredictable and it is rare to have bright sunshine for long stretches and setting up bright lights during the tour was a logistic impossibility. NFB cameramen had heard of an experimental 35 mm film stock that Kodak was developing (Eastman colour) which was supposed to give true colours even during overcast or rainy days. The NFB contacted Kodak and filmed a couple of tests which everyone thought quite satisfactory »
-- Albert Ohayon

Source :
OHAYON, Albert. « Royal Journey: The National Film Board's first major hit », NFB Blog, 4 octobre 2010. [en anglais]