Parallel
A version of a base card made in smaller numbers. Topps describes parallels as looking like the base card but set apart by one physical quality: border color, texture, pattern, card material, image variation or printing technology.
Where this definition comes from
Most trading card products have a base set, made up of common cards, and then a smaller number of more-limited parallel cards.
Topps Ripped glossary: Parallel, readborder color, texture, pattern, card material, image variation, or the printing technology employed
Topps Ripped glossary: Parallel, read
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