Why were photographic prints sepia toned?

sepia process was cheaper than black and white
for improved resistance
it is simply ageing of paper
it is the effect of exposition to sunlight
Sepia toning enhances archival qual­i­ties of the photos. Chem­i­cals are used to convert the metallic silver in the print to a sulfide com­pound, which is at least 50% more stable than silver.

Answers distribution

sepia process was cheaper than black and white
for improved resistance
it is simply ageing of paper
it is the effect of exposition to sunlight
answers
flagItaly
4%
70%
16%
8%
24
flagSpain
10%
70%
0%
20%
10
flagthe Netherlands
18%
62%
7%
11%
27
flagGermany
9%
61%
19%
9%
98
flagBelgium
0%
58%
0%
41%
12
flagPoland
12%
57%
14%
13%
8744
flagthe United Kingdom
15%
52%
12%
19%
205
flagRepublic of Ireland
21%
46%
10%
21%
28
flagRussia
15%
46%
15%
15%
13
flagNorway
6%
43%
25%
18%
16
flagUkraine
23%
41%
17%
17%
17
flagFrance
29%
41%
5%
23%
17
flagAustralia
20%
40%
20%
20%
20
flagDenmark
40%
40%
20%
0%
10
flagthe Philippines
9%
33%
19%
38%
21
flagUnknown
8%
32%
21%
34%
46
flagSweden
30%
30%
10%
20%
10
flagthe United States
19%
29%
14%
35%
234
flagIndia
15%
29%
23%
30%
151
flagCanada
20%
28%
20%
32%
25

Gender

men52%
women61%
sepia process was cheaper than black and white
14%
11%
for improved resistance
52%
61%
it is simply ageing of paper
15%
13%
it is the effect of exposition to sunlight
17%
13%

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