Why in the 19th century did production of dark lagers change to the pale lagers we know today?

Answer 1

Probably because pale beers have less ingredients and more H2O! Darker ales have more hops, malt and barley.
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Answer 2

Brewers have always made pale lagers dark lagers have never been popular in German and central Europe where the lager originated. Dark ales are mainly English in origin and they have always been popular there. The really pale tasteless lagers that are the standard for mass produced American beers came into being after World War II when brewers started making beers that women would drink.

Answer 3

The procedure used to malt the grain involves heating it up, mildly cooking. Until the nineteenth century, all grain was 'cooked' to where it was dark. This color contributed to the beer's color.

In the nineteenth century, improvements were made to the malting process, leaving the grains less 'cooked' and lighter. This resulted in lighter colored beers.

Answer 4

For me
smooth taste and sweetness.
most seem like I would expect camel liquid (piz)