Question: What are the halachic issues with Silk-screened sifrei torah? I am interested in a summary of concise *halakhic* rulings of multiple authorities on the prohibition or permissibility of [HaRav Yitzchak Abadi](http://en.wikipedia.org/wiki/File%3aRabbi_Yitzchak_Abadi.png)'s [innovation](http://kashrut.org/scrollproject/) of silk screen *sifrei torah*. Please provide piskei halacha, and I prefer that the *shitot ha-poskim* come from reputable sources.

(As always, CYLOR before you make any decisions.)

Answer: 
Rav Belsky, on page 9 of *Shulchan Halevi* (English version), explains that while theoretically silk-screening could be kosher for writing Stam, there are some issues which can come up. He mentions that forgeries would increase, and there there could be a problem of kesidran ("written in order," which Teffilin and Mezuzah require).

Then he brings an issue with sirtut (line indents under the letters to help guide the sofer to keep the letters in a straight line) - that Mezuzah needs it, and even according to many shittos a sefer Torah needs it. It could be a problem according to Rabbi Akiva Eiger in *Shailos and Tshuvos* Siman 50.

He ends with the famous idea "chadasha assur min HaTorah" (anything new is forbidden). To revolutionize the way a mitzvah is to be performed or prepared, the initiative has to come from the Gedolei Hador, not from any single individual.

It is best to see it inside since I did not fully elaborate on the topic.
Rav Abadi's original teshuva can be found [here](http://www.hebrewbooks.org/pdfpager.aspx?req=1525&st=&pgnum=359&hilite=).