How to Avoid Bad Acid Trips

Test Your Paper with a pH Pen

January 13, 2006 - ScrapbookCritic.com

Over the past 10 days, I have been trying to figure out the "meaning" of my pH pen test results, and of the responses of the companies whose "acid-free" papers appear to be acidic.

When I first asked the president of Scrapbook.com why his company does not sell pH pens, he claimed that it was because nobody bought them any more, and that people would trust the testing done by manufacturers. Unfortunately, my testing has shown that even "careful" manufacturers (who hire outside testing agencies to measure the acid levels of paper) still sell paper which tests as "acidic."

I used five pH pens. All five pens indicated that one paper (from Nature's Handmade Paper) was acidic. Three of the five pens clearly indicated that two other papers were acidic, but two pens did not apparently change color and thus indicated that those papers were neutral or alkaline.

In the end, then, I was reviewing two different groups of products: pens and papers.


Pens: Here are the five pens I used (in alphabetic order):

My test results were inconsistent with those of a more scientific test done in 1990 (see Alkaline Paper Advocate, November 1990 (Volume 3, Number 5), at least for the Light Impressions pen, which was then identified as being more accurate than some others at detecting variations in pH levels. The pH pen industry has changed since 1990, with new products and merchants, and with the decline in sales of pH pens it appears that some of the pens I bought might have been sitting on a warehouse shelf for several years or more.

When I called Light Impressions on Monday morning, July 25, they immediately admitted that after another customer complained last week, they tested their pens and discovered that the results were not accurate (in some cases, their pens even identified highly acidic newsprint as "acid-free"). The company looked at my scanned results and confirmed that their "normal" pen should give much more distinctive color changes. Light Impressions was not yet certain whether the problem is a manufacturing error, a problem with "shelf life" of the pen, or some other issue. However, they assured me that they are working with their manufacturer, and promised to send a new pen when it is available.

Similarly, Lithco advised that the "shelf life" of the chemical used in its pens is only about six months, and that the pen I used was apparently older than that (which may reflect time stored at the Japanese manufacturer, Lithco's warehouse, and Bosworth's warehouse).

My conclusion is that any consumer who wants to test the acidity of paper should not buy the Light Impressions or Lithco pens, which only changed color for the most acidic papers I used. Instead, I would recommend using the Abbey, American Crafts, or Lineco pens (in that order) -- but it seems likely that some or all of those pens might also "age out" of effectiveness.


Papers: I received responses from two of the three companies whose papers tested as "acidic" by the three pens I recommend.


My conclusion is that scrapbookers should buy a pH pen and test each paper they use.

I would recommend to paper manufacturers that they add a manufacturing date and lot number to each batch of paper they manufacture and print. If consumers could trust such information, they would only need to test one sheet from that "lot." Alas, I suspect many manufacturers would be tempted to save costs by using the same lot number for multiple manufacturing lots or press runs.

I must note that one reason I decided to conduct these tests is that I noticed that many "acid-free" scrapbook papers are manufactured and printed in China, which is notorious for lying about its products (consider the stream of reports indicating the use of "forced labor" to manufacture products for export from China, despite denials by the Chinese government and industry). How can you trust promises from manufacturers in a country where people are killed by the government for telling the truth?

The sky is not falling. My test results do not suggest that there is widespread fraud (or carelessness) in the scrapbooking industry. All five pens indicated that the overwhelming majority of papers were not acidic. And even if a few pieces of paper in your scrapbook aren't truly "acid-free" after a decade, this will probably not substantially reduce the pleasure and knowledge that your family will draw from the scrapbook; the use of page protectors should reduce the risk of acids "leaching" from one paper to another within the scrapbook.

 


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These entries (reviews, critiques, commentaries) are written by Mark J. Welch, and reflect his personal opinions. They are not the opinions of this site's advertisers and sponsors, who are not responsible for this content.

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