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.

globalquiz.org

chemistryhistory of photographyphotographytechnology

Photography quiz Chemistry quiz Technology quiz

You will play as

Answers by country

Poland

14%

52%

15%

16%

14255

Nigeria

10%

35%

16%

35%

128

Belarus

10%

34%

15%

36%

106

Austria

26%

34%

13%

22%

Russia

13%

33%

16%

34%

550

Unknown

17%

32%

11%

36%

Australia

24%

31%

16%

27%

108

Ukraine

15%

30%

17%

33%

463

Kazakhstan

15%

30%

13%

39%

Canada

22%

29%

36%

Germany

20%

26%

17%

33%

575

India

20%

24%

19%

33%

908

the United Kingdom

22%

24%

10%

42%

281

Uzbekistan

26%

23%

16%

33%

the United States

22%

16%

36%

663

Pakistan

22%

21%

25%

28%

Singapore

28%

17%

46%

the Philippines

19%

15%

19%

46%

Switzerland

22%

15%

25%

36%

Malaysia

12%

23%

51%

Does the candle burn more or less violently in zero gravity?

What color is octopus blood?

What is the main difference between Coca-Cola sold in the US, and the Coca-Cola sold in the EU?

What was the exposure time of this photo?