In what year was the preheat-perm method introduced?

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Multiple Choice

In what year was the preheat-perm method introduced?

Explanation:
Understanding when the preheat-perm technique first appeared helps place it in perm history. The preheat-perm method, which uses heated processing to accelerate curling, was introduced in 1931. That year marks the start of deliberately applying heat to speed up chemical action and achieve more consistent waves. The other years listed don’t align with the initial introduction of this method, as they reflect later developments or refinements. So, 1931 is the correct year.

Understanding when the preheat-perm technique first appeared helps place it in perm history. The preheat-perm method, which uses heated processing to accelerate curling, was introduced in 1931. That year marks the start of deliberately applying heat to speed up chemical action and achieve more consistent waves. The other years listed don’t align with the initial introduction of this method, as they reflect later developments or refinements. So, 1931 is the correct year.

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