I received this question via email. I am not really a klaf expert, I was wondering if anyone could answer this question: Dear Rabbi Gutnick, I am writing to you because a good friend of mine has put the idea into my head that the klaf in my tefillin were not really tanned and therefore are not kosher. He referred me to Megilla 19a re diftera. From the research that I have done so far, it seems that the klaf that is used today is tanned only with a lime wash. On all of the tanning websites I’ve seen so far, they say that the lime doesn’t accomplish tanning but only the removal of the hair and some other pre-tanning effects. Would you be able to explain to me or refer me to a website that explains how the tanning process that is used today takes the hide out of the category of diftera? Thank you very much.
I repaired the painting of my retzuot and batim with Dio Lanetzach for Rapidograph.
ReplyDeleteImportant: before painting, rub the area you plan to paint with sand paper to remove most of the old paint. Dio Lanetzach adheres well to sand-papered leather. It may not adhere as well to old paint.
Another note: Do not use Dio Lanetzach to paint new, unpainted, batim. The leather in new batim is slightly oily, which prevents good adhesion.
ReplyDeleteI am now experimenting with mixing Dio lanetzach half/half with acetone, as a first-layer paint. The acetone helps overcome some of the oiliness. But, you must use it all up after mixing. Don't store Dio mixed with acetone for a few days. It can ruin the dio.
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