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
flagCzech Republic
9%
63%
9%
18%
11
flagthe Netherlands
17%
62%
10%
10%
29
flagGermany
9%
61%
18%
8%
101
flagBelgium
0%
58%
0%
41%
12
flagPoland
12%
57%
14%
13%
9334
flagthe United Kingdom
16%
51%
12%
19%
225
flagRepublic of Ireland
20%
48%
10%
20%
29
flagNorway
11%
44%
22%
16%
18
flagRussia
17%
41%
11%
23%
17
flagUnknown
9%
40%
19%
29%
82
flagUkraine
16%
36%
20%
28%
25
flagAustralia
18%
36%
22%
22%
22
flagthe Philippines
9%
36%
18%
36%
22
flagFrance
26%
36%
5%
31%
19
flagCanada
17%
32%
17%
32%
28
flagthe United States
19%
29%
14%
36%
272
flagIndia
16%
29%
21%
30%
175
flagSweden
27%
27%
9%
27%
11
flagIndonesia
0%
20%
20%
50%
10

Gender

men52%
women60%
sepia process was cheaper than black and white
14%
12%
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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