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Does every old envelope have sulfur in it? How can you tell?
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<p>[QUOTE="desertgem, post: 3568888, member: 15199"]"I don't know how to tell what envelopes have sulfur because most sold now are "sulfur free"...was there a year before all paper had it? I was thinking about buying an old used envelope with a stamp on it to prove how old it is maybe?"</p><p><br /></p><p>Sulfites were used in making pulp paper from the mid 1800s. Before, paper was made from cloth or other plant fibers and was rather scarce. One reference stated about the 1850-60s. I have a few stamped envelopes of that era, and the acidic ink has eaten through the paper which is a grocery bag brown and crumbles easily. </p><p>Jim[/QUOTE]</p><p><br /></p>
[QUOTE="desertgem, post: 3568888, member: 15199"]"I don't know how to tell what envelopes have sulfur because most sold now are "sulfur free"...was there a year before all paper had it? I was thinking about buying an old used envelope with a stamp on it to prove how old it is maybe?" Sulfites were used in making pulp paper from the mid 1800s. Before, paper was made from cloth or other plant fibers and was rather scarce. One reference stated about the 1850-60s. I have a few stamped envelopes of that era, and the acidic ink has eaten through the paper which is a grocery bag brown and crumbles easily. Jim[/QUOTE]
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Does every old envelope have sulfur in it? How can you tell?
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