Dating old postcards
And of course any image that contain a regularly patterned series of dots is not a photograph at all but a ink printed image.
Some halftone cards were printed on high gloss paper to resemble a photograph but their screen patterns will give them away if one is vigilant.
The Pioneer Era began when picture postcards were placed on sale by vendors and exhibitors at the Colombian Exposition in Chicago, May 1893.
These were very popular and proved to be a great success.
, but designed to be mailed and have letters written on the back.
As with all photographs, if you examine the images under strong magnification the you’ll see no dot or other printed ink patterns.
These will show standard family poses, including little Jimmy in his school uniform, the family picnicking, a wedding photo.
The American design of postcards was regulated by United States law and can be dated in general by the text and designs.
These presumably sold in larger numbers but, again, I have rarely seen any that have been sent through the post.
Many photographers and publishers have produced views of Edinburgh.
lthough real photo postcards were made in a variety of ways, they hold one identifiable feature in common.
The tonalities of photos are completely continuous to the eye producing true greys, for they are created by the reaction of individual photosensitive molecules to light rather than the transfer of ink from a plate.
Search for dating old postcards:
Some like Valentine of Dundee or GW Wilson of Aberdeen produced very large numbers of cards, covering scenes throughout Britain and elsewhere. The reverse bore a small picture leaving sufficient space to write a message.