Improved-Strength Eastman 35mm Motion-Picture BH Perforations

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Publisher: SMPTE
Doc Type: Journal Article
Article Type: research-article
Abstract: Because of its fundamental shape, the 35mm BH film perforation has historically had a weakness for tearing at the corners. Recognition of this problem, through literature and consumer contact, led to the development by Eastman Kodak Co. of a modified perforation with .005-in. corner radii. Laboratory and field testing confirmed the rounded corners resulted in improved strength with no detrimental effects. Routine production has now begun, and modifications to the standards literature are in progress through the appropriate SMPTE and ISO committees.
Publication Date: 1991-11-01
DOI: 10.5594/J02408
Link: https://doi.org/10.5594/J02408
Author(s): Peter E. Pylipow

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Peter E. Pylipow; Improved-Strength Eastman 35mm Motion-Picture BH Perforations, SMPTE Journal ( Volume: 100, Issue: 11, November 1991); SMPTE, 1991. Available at https://doi.org/10.5594/J02408

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Peter E. Pylipow; Improved-Strength Eastman 35mm Motion-Picture BH Perforations, SMPTE Journal ( Volume: 100, Issue: 11, November 1991); SMPTE, 1991. Available at https://doi.org/10.5594/J02408

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Peter E. Pylipow; Improved-Strength Eastman 35mm Motion-Picture BH Perforations, SMPTE Journal ( Volume: 100, Issue: 11, November 1991); SMPTE, 1991. Available at https://doi.org/10.5594/J02408

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<span class="citation">Peter E. Pylipow; <cite>Improved-Strength Eastman 35mm Motion-Picture BH Perforations</cite>, SMPTE Journal ( Volume: 100, Issue: 11, November 1991); SMPTE, 1991. Available at <a href="https://doi.org/10.5594/J02408" target="_blank" rel="noopener">https://doi.org/10.5594/J02408</a></span>

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Peter E. Pylipow; Improved-Strength Eastman 35mm Motion-Picture BH Perforations, SMPTE Journal ( Volume: 100, Issue: 11, November 1991); SMPTE, 1991
doi: 10.5594/J02408
url: https://doi.org/10.5594/J02408

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Peter E. Pylipow; <cite id="bib-10-5594-j02408">Improved-Strength Eastman 35mm Motion-Picture BH Perforations</cite>, SMPTE Journal ( Volume: 100, Issue: 11, November 1991); SMPTE, 1991
<span class="doi">10.5594/J02408</span>
</li>