To make clean straight folds in cardboard, first make a crease along the line with a blunt edge such as a spoon handle, then fold against a firm straight edge.

为了使清洁直纸板折叠，先如勺子处理沿钝边行折痕，然后对折直边坚定。

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PLUSES: the trick is begun with a clean, nose-down entrance from a Fade, and the roll-up is in a straight line.

优点：动作开始在由“飘”形成的清晰的机头向下的起点上，并且绕线动作完成在一条垂直线上。

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