Write on silk

Is it permissible to write a seal, when silk is placed on the parchment and has holes in it, which are the letters, in which the scribe 'writes'?
Is this kosher writing?
And if we don't call it writing, would it be permissible to write like that on Shabbat?

(My late grandfather told me that the main opposition in his area to machine-made matzos was because widows and orphans made a living by baking matzos by hand, and when they brought the machine-made matzos, they were reluctant to bake them, and not really because they were concerned that machine-made matzos were not kosher or even fancy. Is it possible that progress can be made in the Satam as well, and only concerns about employment for the army of scribes are preventing it? And if so, why do the interests of the scribes outweigh the interests of the public in the eyes of halachic adjudicators?)