I politely disagree with being able to identify trimming, as an exact science. No grader I have ever spoken with (and I have spoken to many) say it's an exact science. Take your factory guillotine cut cards, cut a sliver off with an exacto knife, and rub your finger over the edges. There is no way to tell it was cut, period. And nothing anyone says will convince me otherwise.
Just my opinion and everyone has their own ideas. I only base mine on experience.
Quote:
Originally Posted by steve B
I am confident. Every manufacturing process leaves evidence of itself.
it isan exact science.
A guillotine cutter and a home or even pro paper cutter will leave a different cut. A sharp blade leaves a different cut than a dull one. Die Cutting which is used for most modern cards is different than any of them. Same for rotary shears.
The only exception I'd make to detectable or not would be using a professional guillotine cutter on cards produced using that type of cutter. And that has some very real challenges if you're trying to trim an individual card.
Size doesn't really matter, within limits. What matters is edge quality and placement. The edges ae also directional.
You were very close with the rough edges on a trimmed card being in the wrong place. I would bet that those edges are not in the correct direction
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