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- Lineco pH Testing Pen for Paper or Paperboard Products.
- Original price was: $9.03.Current price is: $7.80.
- Basic Info: Material created and made in USA. Lineco is a leading and trusted brand for archival art, photography, and framing supplies Quick reflection: Shows within seconds if your paper products are archival. Clear or yellow line means bad - Purple line means archival Storage condition: Paper can be reasonably long-lived if its pH is 6.0 or higher, especially if…
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