Silk is classically associated with glass and fur with rubber, but from the table silk should make glass positive and make rubber negative.
2.
Paraskeva's glass positives or lantern slides, most of them stereoscopic plates, include photographs of Greece, Egypt, France, Venice and the Alps.
3.
Opalotype photography, never common, was practiced in various forms until it waned and disappeared in the 1930s . " Milk glass positive " is another alternative term for an opalotype.
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